Time to learn ... which is what you require of your students ... so don't excuse yourself from that same 'requirement' cause you *are* the server admin/moodle administrator!
Please see/read/study:
https://www.thegeekdiary.com/understanding-basic-file-permissions-and-ownership-in-linux/
and since you are using cPanel:
https://blog.cpanel.com/how-to-assign-permissions-to-files-and-folders-in-cpanel/
And I'll repeat ... one more time ... can only conclude that Softac did this. Thus Provider should know how to help customers.
'SoS', Ken