Ojs-3.3.0-3 Failed Ajax request or invalid JSON returned

Dear friends,
I have this message “Failed Ajax request or invalid JSON returned.” when i try to add an contributor for a new submit article.

  • Application Version: OJS-3.3.0-3

  • Description of issue : submit an article → Add Contributor

  • Screenshots
    Capture

Hi @Mohamed_SANDELI

You’ll need to talk to your systems administrator in this case. There is probably an error being recorded in the web server error log. Look for “Fatal Error” in there.

Best
Jason

How, did you solve this error?