[Darth-Apple]

PHP 7.4 currently. It was throwing missing function errors in some of the files without any obvious cause (there is no evidence of any actual missing functions). I assume it was either conflicting with another namespace in another DVZ plugin or some PHP extension was missing.

Was a very weird issue. I would have looked into it more had MentionMe not worked instead, but the other plugin seems to be working fine. Has autocomplete built-in too, which is a plus.

I'm afraid if my web space provider forces me to switch to PHP8, Mybb itself runs under php8 but many plugins are no longer maintained or adapted to php8

Yea, there will be a lot of incompatibilities for sure. Self hosting is probably going to be easier than dealing with PHP8 with the amount of breaking changes they introduced. 

I'm going to be working on updating several of mine in the coming weeks, but there are a lot of other plugin authors as well that also have incompatibilities. PHP7 broke a lot of things too, but it was generally for better reasons. PHP8 is going to be a mess to plan for.