Please note that by answering your own post you take yourself out of the MODS "unanswered posts" queue and therefore might have to wait longer for a response - it's better to edit your original post so this does not happen.
1. make sure you are using G5.5.15
2. check everything else is up to date too.
3. You cannot use PHP 8.1.x only go as high as PHP 8.0.x
If you need more help, Please would you post your URL, superuser id and pswd in the secure tab of your post and I'll have a look for you.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.