Hello everyone,
Hope my message finds you well,
in the past few weeks, we had a project to upgrade our current Moodle site from 3.4 to 3.8 as we are running some plugins are not compatible with newer versions of Moodle. the 3.8.4+ was the only version we could upgrade to. so long story short, all the upgrade process and pain throughout was ok until we stumbled upon the following error
SyntaxError: Unexpected token _ in JSON at position 0
at parse ()
at ajaxConvert (https://mymoodlesite/lib/javascript.php/-1/lib/jquery/jquery-3.5.1.js:9260:19)
at done (https://mymoodlesite/lib/javascript.php/-1/lib/jquery/jquery-3.5.1.js:9736:15)