the problem is when I want to download a pdf, a blank page appears. same as the view button I get a blank page.
LOG ERROR :
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Only variables should be passed by reference in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPApplication.inc.php on line 210
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of WebFeedPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/generic/webFeed/WebFeedPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of ArticleHandler::authorize() should be compatible with PKPHandler::authorize($request, &$args, $roleAssignments, $enforceRestrictedSite = true) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/pages/article/ArticleHandler.inc.php on line 19
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of ArticleHandler::initialize() should be compatible with PKPHandler::initialize($request, $args = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/pages/article/ArticleHandler.inc.php on line 19
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of PublishedArticleDAO::getBySetting() should be compatible with ArticleDAO::getBySetting($settingName, $settingValue, $journalId = NULL, $rangeInfo = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/article/PublishedArticleDAO.inc.php on line 20
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method Request::getContext() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/plugins/ThemePlugin.inc.php on line 372
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/core/Request.inc.php on line 68
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of InformationBlockPlugin::getContents() should be compatible with BlockPlugin::getContents($templateMgr, $request = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/blocks/information/InformationBlockPlugin.inc.php on line 18
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of LanguageToggleBlockPlugin::getContents() should be compatible with BlockPlugin::getContents($templateMgr, $request = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/blocks/languageToggle/LanguageToggleBlockPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of WebFeedBlockPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/generic/webFeed/WebFeedBlockPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getUser() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 192
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 564
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getUser() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 86
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 564
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method Request::getJournal() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 59
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/core/Request.inc.php on line 42
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of InstitutionalSubscription::isValid() should be compatible with Subscription::isValid($check = SUBSCRIPTION_DATE_BOTH, $checkDate = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/subscription/InstitutionalSubscription.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getRemoteDomain() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 157
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 453
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getRemoteAddr() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 157
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 425
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of SubmissionKeywordDAO::build() should be compatible with ControlledVocabDAO::build($symbolic, $assocType = 0, $assocId = 0) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/submission/SubmissionKeywordDAO.inc.php on line 21
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of SubmissionKeywordEntryDAO::getByControlledVocabId() should be compatible with ControlledVocabEntryDAO::getByControlledVocabId($controlledVocabId, $rangeInfo = NULL, $filter = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/submission/SubmissionKeywordEntryDAO.inc.php on line 20
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of SubmissionFileDAO::fromRow() should be compatible with PKPSubmissionFileDAO::fromRow($row, $fileImplementation) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/article/SubmissionFileDAO.inc.php on line 23
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of AbntCitationPlugin::fetchCitation() should be compatible with CitationPlugin::fetchCitation($article, $issue, $journal) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/citationFormats/abnt/AbntCitationPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of AbntCitationPlugin::manage() should be compatible with Plugin::manage($args, $request) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/citationFormats/abnt/AbntCitationPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Only variables should be passed by reference in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPApplication.inc.php on line 210
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of WebFeedPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/plugins/generic/webFeed/WebFeedPlugin.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of ArticleHandler::authorize() should be compatible with PKPHandler::authorize($request, &$args, $roleAssignments, $enforceRestrictedSite = true) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/pages/article/ArticleHandler.inc.php on line 19
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of ArticleHandler::initialize() should be compatible with PKPHandler::initialize($request, $args = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/pages/article/ArticleHandler.inc.php on line 19
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of PublishedArticleDAO::getBySetting() should be compatible with ArticleDAO::getBySetting($settingName, $settingValue, $journalId = NULL, $rangeInfo = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/article/PublishedArticleDAO.inc.php on line 20
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getUser() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 192
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 564
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getUser() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 86
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 564
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method Request::getJournal() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 59
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/core/Request.inc.php on line 42
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of InstitutionalSubscription::isValid() should be compatible with Subscription::isValid($check = SUBSCRIPTION_DATE_BOTH, $checkDate = NULL) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/subscription/InstitutionalSubscription.inc.php on line 0
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getRemoteDomain() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 157
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 453
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::getRemoteAddr() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/issue/IssueAction.inc.php on line 157
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/classes/core/PKPRequest.inc.php on line 425
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Strict Standards: Declaration of SubmissionFileDAO::fromRow() should be compatible with PKPSubmissionFileDAO::fromRow($row, $fileImplementation) in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/classes/article/SubmissionFileDAO.inc.php on line 23
[09-Apr-2021 15:09:20 Asia/Jakarta] PHP Deprecated: Non-static method Config::getContextBaseUrls() should not be called statically, assuming $this from incompatible context in /home/jurn9932/public_html/tesojs.undhirabali.ac.id/lib/pkp/plugins/generic/usageEvent/PKPUsageEventPlugin.inc.php on line 202
Help me please