Hi all. Just a quick FYI:
I just upgraded one of my Moodle courses to 3.8. While doing the upgrade, I received a not extremely helpful message:
An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.
This is NOT a Moodle error. There is a Mod_Security setting on the server that needs to be adjusted. On one hosting site, I have access to Mod Security in CPANEL. In another, I do not (naturally, this installation was on the "other").
Anyway, a connection to Live Chat, a request for them to whitelist */admin/upgradesettings.php and I'm all set.
Again, just an FYI in case you hit a similar issue.