Http error during upload of submission file OJS 3.1.2

I am facing the http error while upload a submission.
Screenshot of the issue is:
image

I have tried changing the permission to 777 and all permission seemed to be fine. Also disabled the add this and custom block manage plugin. I am using the PHP version 7.2
Help me find out the issue.
Error Log have the following information:
[07-Apr-2019 02:53:07 UTC] PHP Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 1003
[07-Apr-2019 02:53:07 UTC] PHP Warning: Declaration of AddThisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/addThis/AddThisPlugin.inc.php on line 168
[07-Apr-2019 02:53:07 UTC] PHP Warning: Declaration of CustomBlockPlugin::getBlockContext() should be compatible with BlockPlugin::getBlockContext($contextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/customBlockManager/CustomBlockPlugin.inc.php on line 134
[07-Apr-2019 02:55:02 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 263
[07-Apr-2019 02:55:02 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 359
[07-Apr-2019 02:55:02 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 2921
[07-Apr-2019 02:55:02 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 3939
[07-Apr-2019 02:55:02 UTC] PHP Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 1003
[07-Apr-2019 02:55:02 UTC] PHP Warning: Declaration of AddThisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/addThis/AddThisPlugin.inc.php on line 168
[07-Apr-2019 02:55:02 UTC] PHP Warning: Declaration of CustomBlockPlugin::getBlockContext() should be compatible with BlockPlugin::getBlockContext($contextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/customBlockManager/CustomBlockPlugin.inc.php on line 134
[07-Apr-2019 02:55:06 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 263
[07-Apr-2019 02:55:06 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 359
[07-Apr-2019 02:55:06 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 2921
[07-Apr-2019 02:55:06 UTC] 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 /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 3939
[07-Apr-2019 02:55:06 UTC] PHP Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/naeemijr/public_html/ephjournal.com/lib/pkp/lib/adodb/adodb.inc.php on line 1003
[07-Apr-2019 02:55:06 UTC] PHP Warning: Declaration of AddThisPlugin::register($category, $path) should be compatible with LazyLoadPlugin::register($category, $path, $mainContextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/addThis/AddThisPlugin.inc.php on line 168
[07-Apr-2019 02:55:06 UTC] PHP Warning: Declaration of CustomBlockPlugin::getBlockContext() should be compatible with BlockPlugin::getBlockContext($contextId = NULL) in /home/naeemijr/public_html/ephjournal.com/plugins/generic/customBlockManager/CustomBlockPlugin.inc.php on line 134

Hi,

Those PHP warnings are cosmetic and would not cause the issue you’re seeing. Can you look closely and see if there is a “fatal error” in there some place?

Cheers,

No, I cant see any fatal error. Each time I see the http error while uploading any kind of file with extension pdf/doc/docx etc.