OJS 3.1.1.4 getting blank page

Hi,

Saturday I tried to upgrade from 3.1.1.4 to 3.1.2 and got 405 not allowed error 405 not allowed nginx/1.14.1. After this, I replaced my old files and database from my backup. After that I am getting only blank page. if I remove plugins folder I am getting the home page without style but login page is not working. My site threatenedtaxa.org is not working for the last 2 days. Urgent help is required.

Error message when plugins folder is there.

[13-May-2019 03:14:43 UTC] PHP Warning: Module ‘SourceGuardian’ already loaded in Unknown on line 0
[12-May-2019 22:14:43 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Smarty has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/vendor/smarty/smarty/libs/Smarty.class.php on line 64
[12-May-2019 22:14:43 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADODB_Cache_File has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 263
[12-May-2019 22:14:43 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADOConnection has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 359
[12-May-2019 22:14:43 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 2921
[12-May-2019 22:14:43 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet_array has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 3939
[12-May-2019 22:14:43 America/Chicago] PHP Warning: Declaration of TexturePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/texture/TexturePlugin.inc.php on line 19
[12-May-2019 22:14:43 America/Chicago] PHP Warning: Declaration of CustomHeaderPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/customHeader/CustomHeaderPlugin.inc.php on line 141
[12-May-2019 22:14:43 America/Chicago] PHP Warning: Declaration of ShariffPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/shariff/ShariffPlugin.inc.php on line 198
[12-May-2019 22:14:43 America/Chicago] PHP Parse error: syntax error, unexpected ‘new’ (T_NEW) in /home1/jott/public_html/plugins/generic/booksForReview/BooksForReviewPlugin.inc.php on line 41

Error message when plugins folder is removed.

Unknown locale component LOCALE_COMPONENT_OJS_MANAGER

Stack Trace:

File: /home1/jott/public_html/pages/login/LoginHandler.inc.php line 122

Function: PKPLocale::requireComponents(“LOCALE_COMPONENT_OJS_MANAGER”, 4)

File: /home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php line 27
Function: LoginHandler->setupTemplate(Object(Request))

File: /home1/jott/public_html/lib/pkp/classes/core/PKPRouter.inc.php line 390
Function: PKPLoginHandler->index(Array(0), Object(Request))

File: /home1/jott/public_html/lib/pkp/classes/core/PKPPageRouter.inc.php line 232
Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(0), False)

File: /home1/jott/public_html/lib/pkp/classes/core/Dispatcher.inc.php line 134
Function: PKPPageRouter->route(Object(Request))

File: /home1/jott/public_html/lib/pkp/classes/core/PKPApplication.inc.php line 247
Function: Dispatcher->dispatch(Object(Request))

File: /home1/jott/public_html/index.php line 68
Function: PKPApplication->execute()

Now I am getting this error. Please someone help me at the earliest. Our site is not working for the last 3 days.

PHP Fatal error: require_once(): Failed opening required ‘/home1/jott/public_html/classes/plugins/ThemePlugin.inc.php’ (include_path=’.:/home1/jott/public_html/classes:/home1/jott/public_html/pages:/home1/jott/public_html/lib/pkp:/home1/jott/public_html/lib/pkp/classes:/home1/jott/public_html/lib/pkp/pages:/home1/jott/public_html/lib/pkp/lib/adodb:/home1/jott/public_html/lib/pkp/lib/phputf8:/home1/jott/public_html/lib/pkp/lib/pqp/classes:/home1/jott/public_html/lib/pkp/lib/smarty:.:/opt/php70/bin/php’) in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25

The “plugins” folder is required. Are you removing it entirely? It looks like you have an old version of the “booksForReview” plugin in the “plugins/generic” folder which was causing the initial error. I would remove only that folder from within the plugins folder.

I did that but still I am getting blank page. Our site is down for the last 3 days. I require some urgent help. Thanks.

[13-May-2019 14:01:52 UTC] PHP Warning: PHP Startup: Unable to load dynamic library ‘/opt/php71/lib/php/extensions/no-debug-non-zts-20160303/ixed.7.0.lin’ - /opt/php71/lib/php/extensions/no-debug-non-zts-20160303/ixed.7.0.lin: cannot open shared object file: No such file or directory in Unknown on line 0
[13-May-2019 14:01:52 UTC] PHP Warning: PHP Startup: SourceGuardian: Unable to initialize module
Module compiled with module API=20160303
PHP compiled with module API=20151012
These options need to match
in Unknown on line 0
[13-May-2019 09:01:52 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Smarty has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/vendor/smarty/smarty/libs/Smarty.class.php on line 64
[13-May-2019 09:01:52 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADODB_Cache_File has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 263
[13-May-2019 09:01:52 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADOConnection has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 359
[13-May-2019 09:01:52 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 2921
[13-May-2019 09:01:52 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet_array has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/adodb/adodb.inc.php on line 3939
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of TexturePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/texture/TexturePlugin.inc.php on line 19
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of CustomHeaderPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/customHeader/CustomHeaderPlugin.inc.php on line 141
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of ShariffPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/shariff/ShariffPlugin.inc.php on line 198
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of BooksForReviewPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/booksForReview/BooksForReviewPlugin.inc.php on line 554
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of BooksForReviewPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home1/jott/public_html/plugins/generic/booksForReview/BooksForReviewPlugin.inc.php on line 554
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of AnnouncementFeedPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/announcementFeed/AnnouncementFeedPlugin.inc.php on line 148
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of AnnouncementFeedPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/announcementFeed/AnnouncementFeedPlugin.inc.php on line 148
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of BrowsePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/browse/BrowsePlugin.inc.php on line 192
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of BrowsePlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/browse/BrowsePlugin.inc.php on line 192
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of BrowsePlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home1/jott/public_html/plugins/generic/browse/BrowsePlugin.inc.php on line 192
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of GoogleViewerPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/googleViewer/GoogleViewerPlugin.inc.php on line 67
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of ReferralPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/referral/ReferralPlugin.inc.php on line 288
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of ReferralPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/referral/ReferralPlugin.inc.php on line 288
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of XMLGalleyPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/xmlGalley/XMLGalleyPlugin.inc.php on line 326
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of XMLGalleyPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/xmlGalley/XMLGalleyPlugin.inc.php on line 326
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PKPUsageEventPlugin::getEnabled() should be compatible with LazyLoadPlugin::getEnabled($contextId = NULL) in /home1/jott/public_html/lib/pkp/plugins/generic/usageEvent/PKPUsageEventPlugin.inc.php on line 386
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of DataversePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/dataverse/DataversePlugin.inc.php on line 1836
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of DataversePlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/dataverse/DataversePlugin.inc.php on line 1836
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of DataversePlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home1/jott/public_html/plugins/generic/dataverse/DataversePlugin.inc.php on line 1836
[13-May-2019 09:01:53 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; DataversePackager has a deprecated constructor in /home1/jott/public_html/plugins/generic/dataverse/classes/DataversePackager.inc.php on line 17
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of DataversePackager::addFile($filePath, $fileName) should be compatible with PackagerAtomTwoStep::addFile($sac_thefile) in /home1/jott/public_html/plugins/generic/dataverse/classes/DataversePackager.inc.php on line 17
[13-May-2019 09:01:53 America/Chicago] PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; SWORDAPPClient has a deprecated constructor in /home1/jott/public_html/lib/pkp/lib/swordappv2/swordappclient.php on line 12
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PhpMyVisitesPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/phpMyVisites/PhpMyVisitesPlugin.inc.php on line 182
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PhpMyVisitesPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/phpMyVisites/PhpMyVisitesPlugin.inc.php on line 182
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of SehlPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/sehl/SehlPlugin.inc.php on line 134
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of ExternalFeedPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/externalFeed/ExternalFeedPlugin.inc.php on line 409
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of ExternalFeedPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/externalFeed/ExternalFeedPlugin.inc.php on line 409
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of CustomLocalePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/customLocale/CustomLocalePlugin.inc.php on line 136
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of CustomLocalePlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/customLocale/CustomLocalePlugin.inc.php on line 136
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of StopForumSpamPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/stopForumSpam/StopForumSpamPlugin.inc.php on line 213
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of StopForumSpamPlugin::manage($verb, $args, &$message, &$messageParams) should be compatible with Plugin::manage($args, $request) in /home1/jott/public_html/plugins/generic/stopForumSpam/StopForumSpamPlugin.inc.php on line 213
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PLNPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/pln/PLNPlugin.inc.php on line 681
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of AddThisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/addThis/AddThisPlugin.inc.php on line 175
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of AllowedUploadsPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/allowedUploads/AllowedUploadsPlugin.inc.php on line 136
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PiwikPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/piwik/PiwikPlugin.inc.php on line 156
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of PiwikPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home1/jott/public_html/plugins/generic/piwik/PiwikPlugin.inc.php on line 156
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of CoinsPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/coins/CoinsPlugin.inc.php on line 131
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of SwordPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/sword/SwordPlugin.inc.php on line 295
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of SwordPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home1/jott/public_html/plugins/generic/sword/SwordPlugin.inc.php on line 295
[13-May-2019 09:01:53 America/Chicago] PHP Warning: Declaration of JatsTemplatePlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home1/jott/public_html/plugins/generic/jatsTemplate/JatsTemplatePlugin.inc.php on line 261
[13-May-2019 09:01:53 America/Chicago] PHP Warning: require_once(/home1/jott/public_html/classes/plugins/ThemePlugin.inc.php): failed to open stream: No such file or directory in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25
[13-May-2019 09:01:53 America/Chicago] PHP Fatal error: require_once(): Failed opening required ‘/home1/jott/public_html/classes/plugins/ThemePlugin.inc.php’ (include_path=’.:/home1/jott/public_html/classes:/home1/jott/public_html/pages:/home1/jott/public_html/lib/pkp:/home1/jott/public_html/lib/pkp/classes:/home1/jott/public_html/lib/pkp/pages:/home1/jott/public_html/lib/pkp/lib/adodb:/home1/jott/public_html/lib/pkp/lib/phputf8:/home1/jott/public_html/lib/pkp/lib/pqp/classes:/home1/jott/public_html/lib/pkp/lib/smarty:.:/opt/php71/lib/php’) in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25

Was the upgrade process successful? If not, you’ll need to upgrade once more from a backup. Do not forget to remove the problematic plugin before an upgrade.

No the upgrade was failure. So I have my old version 3.1.1.4 files back. I removed the BookReview plugin but still getting blank page.

Now I dont want to upgrade but have to restore my site using the old version.

Is this the error that you have encountered after the new upgrade? If yes, it says that by the specified path the file is missing or haven’t got enough permissions. Can you double check this?

Do you have a backup of the database?

Yes I have. Please let me know how to proceed with.

Restoring to the previous version will involve replacing each of the following to the pre-upgraded state:

  • OJS Code
  • Private and Public Files
  • OJS Database

Once you have replaced each, your should be able to try accessing the system as it was prior to the upgrade. Note that you cannot merge the code, files, or database with the partially upgraded counterpart. You must fully remove the code, files and database and restore the clean backup.

If you still encounter a PHP error after restoring the clean backup of the code, files, and database, let us know what the error message reads.

1 Like

Now everything works but the login page is not working. Getting just a blank page.

I can’t able to login as adminstrator also.

Login page is not working. Kindly let me know how to rectify this.

Here is our error_logs.

[14-May-2019 04:08:11 America/Chicago] PHP Fatal error: Can’t use method return value in write context in /home1/jott/public_html/plugins/generic/citationStyleLanguage/lib/vendor/seboettg/citeproc-php/src/Seboettg/CiteProc/Styles/ConsecutivePunctuationCharacterTrait.php on line 59
[14-May-2019 04:08:22 America/Chicago] PHP Warning: require_once(/home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php): failed to open stream: No such file or directory in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25
[14-May-2019 04:08:22 America/Chicago] PHP Fatal error: require_once(): Failed opening required ‘/home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php’ (include_path=’.:/home1/jott/public_html/classes:/home1/jott/public_html/pages:/home1/jott/public_html/lib/pkp:/home1/jott/public_html/lib/pkp/classes:/home1/jott/public_html/lib/pkp/pages:/home1/jott/public_html/lib/pkp/lib/adodb:/home1/jott/public_html/lib/pkp/lib/phputf8:/home1/jott/public_html/lib/pkp/lib/pqp/classes:/home1/jott/public_html/lib/pkp/lib/smarty:.:/opt/php54/lib/php’) in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25
[14-May-2019 04:08:24 America/Chicago] ojs2: 404 Not Found
[14-May-2019 04:08:25 America/Chicago] PHP Warning: require_once(/home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php): failed to open stream: No such file or directory in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25
[14-May-2019 04:08:25 America/Chicago] PHP Fatal error: require_once(): Failed opening required ‘/home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php’ (include_path=’.:/home1/jott/public_html/classes:/home1/jott/public_html/pages:/home1/jott/public_html/lib/pkp:/home1/jott/public_html/lib/pkp/classes:/home1/jott/public_html/lib/pkp/pages:/home1/jott/public_html/lib/pkp/lib/adodb:/home1/jott/public_html/lib/pkp/lib/phputf8:/home1/jott/public_html/lib/pkp/lib/pqp/classes:/home1/jott/public_html/lib/pkp/lib/smarty:.:/opt/php54/lib/php’) in /home1/jott/public_html/lib/pkp/includes/functions.inc.php on line 25

Does the file /home1/jott/public_html/lib/pkp/pages/login/PKPLoginHandler.inc.php exist in your installation?

I have solved the login issue. Now the submission page is not working. I am not getting the submission list.

What did you do to solve the login issue, and what new error messages do you see for the submission list?

Actually when I upgraded from 2.4.8 to 3.1.1.4, many old files stayed in the current folders. I was going through each folder and erasing the unwanted files one by one and it started working. Only submission page is not working.

It’s odd that everything was working fine, after up-gradation to 3.1.1.4, for the last 6 months but suddenly everything happened when i tried to upgrade to 3.1.2.

Unless you have a lot of local modifications to the source code, I would strongly recommend replacing the source code with a clean copy of OJS 3.1.1-4, using the “Full Package” upgrade instructions:

Having dangling files from old versions mixed in with a newer release is likely to cause problems.

I have done as you suggested. Now some of the backend tabs (components, plugins, roles, users, etc.,) are just loading but not seems to get the data

Ensure you do not have “display_errors” set in your config.inc.php. Check your PHP error log for associated “PHP Error” or “PHP Fatal” messages.

You may find more details by using your browser’s “Web Inspector” tool to see any javascript errors (in the Console) or failed HTTP traffic from the Network tab.