We have been using OJS for the last few years and it was perfect for us. Currently, we are using OJS 3.1.14.
We are facing Error 500 on the Submission page. And the rest of the Website is working fine.
Could you check and share your PHP log? It should contain more information about the error.
Thank you for replying. The issue has been solved. PHP version 5.4 was not supporting that section of OJS.
Glad to hear your issue is solved! Thanks for letting me know.