PDFs of the articles previously opened fine, but now I receive an error message:
www.journals.ac.za refused to connect
.However, when I click on the Download button in the top right corner, the PDF does download. B[ut it no longer displays on screen.
Please see: https://www.journals.ac.za/jlt/index
Which version of OJS are you using?
Can you check if the “PDF.JS PDF Viewer” plugin is active?
I see we use Open Journal Systems 220.127.116.11". I also checked under available plugins: the PDF.JS PDF Viewer” plugin box is ticked, so I presume it is active …
Any other suggestions?
Thanks so much for your answer.
Can you check the error log on your server for the domain that used by the OJS?
I will ask our IT team to check this out and revert. Thanks again!
You are using an old version. I also suggest you to update.
I think the problem is not in php or in the resource file, but in the website security settings (apache? ngnix?).
If I visit the pdf page of your journal (on Firefox) and I read the browser console, it shows a Content Security Policy warning. It says that page settings “frame-ancestors” blocked the resources loading.
I can’t help you more than this because I have zero knowledge in that field, but at least I pointed the way
This may be helpful! I will send this to our IT team.