I have been asked by one editor to help in solving issue:They use OJS 3.0.1.0
When visitor click on PDF it is pointed to proper link but page is not displaying pdfviewer with file. There are no error messages on missing stream etc. since as far as I can see plgin is is not invoked although it is installed and turned on. I checked error_log and I found some messages for several plugins including pdfjsviewer
[25-May-2018 16:02:48 UTC] PHP Strict Standards: Declaration of SubmissionKeywordEntryDAO::getByControlledVocabId() should be compatible with ControlledVocabEntryDAO::getByControlledVocabId($controlledVocabId, $rangeInfo = NULL, $filter = NULL) in /home/user-journal/public_html/journal/lib/pkp/classes/submission/SubmissionKeywordEntryDAO.inc.php on line 20
[25-May-2018 16:02:48 UTC] PHP Strict Standards: Declaration of SubmissionFileDAO::fromRow() should be compatible with PKPSubmissionFileDAO::fromRow($row, $fileImplementation) in /home/user-journal/public_html/journal/classes/article/SubmissionFileDAO.inc.php on line 23
[25-May-2018 16:02:48 UTC] PHP Strict Standards: Declaration of AbntCitationPlugin::fetchCitation() should be compatible with CitationPlugin::fetchCitation($article, $issue, $journal) in /home/user-journal/public_html/journal/plugins/citationFormats/abnt/AbntCitationPlugin.inc.php on line 0
[25-May-2018 16:02:48 UTC] PHP Strict Standards: Declaration of AbntCitationPlugin::manage() should be compatible with Plugin::manage($args, $request) in /home/user-journal/public_html/journal/plugins/citationFormats/abnt/AbntCitationPlugin.inc.php on line 0
[25-May-2018 16:02:48 UTC] PHP Strict Standards: Only variables should be assigned by reference in /home/user-journal/public_html/journal/plugins/generic/orcidProfile/OrcidProfilePlugin.inc.php on line 90
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of PdfJsViewerPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/user-journal/public_html/journal/plugins/generic/pdfJsViewer/PdfJsViewerPlugin.inc.php on line 17
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of WebFeedPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/user-journal/public_html/journal/plugins/generic/webFeed/WebFeedPlugin.inc.php on line 0
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of RecommendByAuthorPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/user-journal/public_html/journal/plugins/generic/recommendByAuthor/RecommendByAuthorPlugin.inc.php on line 0
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of LensGalleyPlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/user-journal/public_html/journal/plugins/generic/lensGalley/LensGalleyPlugin.inc.php on line 0
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of OrcidProfilePlugin::getTemplatePath() should be compatible with Plugin::getTemplatePath($inCore = false) in /home/user-journal/public_html/journal/plugins/generic/orcidProfile/OrcidProfilePlugin.inc.php on line 0
[25-May-2018 16:03:28 UTC] PHP Strict Standards: Declaration of PageHandler::authorize() should be compatible with PKPHandler::authorize($request, &$args, $roleAssignments, $enforceRestrictedSite = true) in /home/user-journal/public_html/journal/lib/pkp/controllers/page/PageHandler.inc.php on line 19
Please advise.