MyBB Community Forums

Hello, when I login to AdminCP, I saw that there are 5-6 lines of error messages above:

MyBB Internal: One or more warnings occurred. Please contact your administrator for assistance.

I can login to AdminCP succesfully, but when I click on any other page website kicks me out and wants me to login again, when I try to login for any specific page (module=user for example) I can't login at all, it keeps saying Invalid Administration session. (basically kicks me back as I login)

Any idea what's going on?

bad cookie setting ? did you change something in your domain or url ?

No I didnt, there's also another issue, whenever URL has Turkish letter in it, it doesn't work anymore. For example we have a subforum called "İnternet" and forum can't find it.

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It seems deactivating all the plugins via FTP solved it, I believe it's caused by Google SEO (and possibly server related PHP update) but I will investigate further.

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I managed to activate logs,

Warning [2] Cannot modify header information - headers already sent by (output started at /inc/class_error.php:229) - Line: 64 - File: admin/index.php PHP 7.4.32 (Linux)

[PHP] errorHandler->error
/inc/functions.php 2072 header
/inc/functions.php 2085 my_setcookie
/admin/index.php 532 my_unsetcookie

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So, I contacted the server, it seems they fixed "header information" issue.