Errors Fixes

Hello,

A lot things have been fixed and I cannot really list them all here. All the new errors were generating because of the server upgrade as this server has a newer php version and MyBB is like a vintage forum software, who's devs just don't wanna upgrade their code. Their code is absurd and buggy. I had to make a lot of changes to make the forum work again.

The most erroneous plugin was Euan T's MyAlerts. But hopefully, all that has been fixed.

Please report any bugs.

Regards,
FireLord Sozin