Server on PHP 8.0 gives the same failure as on 8.1

Hoster can´t find errors...

Forum runs on 4.7.5

Maria DB is 10.5.18

Hoster asks me to go back from PHP8.1 to PHP7.4 for test....

Just to be on the safe side:
The forum has existed since Invison forums have existed. I remember that once a database had to be enlarged after many new users had registered. That this database is too small again can not be the fault, right?

In the support aerea I have 2 notices:

The problem in the log is always the same:

IPS\Http\Url\Exception: INVALID_URL (0)
#0 /www/htdocs/w00afc19/start/forum/system/Http/Url.php(245): IPS\Http\_Url::componentsFromUrlString('', false)
#1 /www/htdocs/w00afc19/start/forum/applications/core/modules/front/system/redirect.php(38): IPS\Http\_Url::createFromString('')
#2 /www/htdocs/w00afc19/start/forum/system/Dispatcher/Controller.php(118): IPS\core\modules\front\system\_redirect->manage()
#3 /www/htdocs/w00afc19/start/forum/system/Dispatcher/Dispatcher.php(153): IPS\Dispatcher\_Controller->execute()
#4 /www/htdocs/w00afc19/start/forum/index.php(13): IPS\_Dispatcher->run()
#5 {main}

#0 /www/htdocs/w00afc19/start/forum/init.php(1029): IPS\_Log::log('IPS\\Http\\Url\\Ex...', 'uncaught_except...')
#1 [internal function]: IPS\IPS::exceptionHandler(Object(IPS\Http\Url\Exception))
#2 {main}

The error message appears as soon as someone tries to log in. This also applies to users who have been here for a long time. After logging out, you can no longer log in!

I have delete one user and ak him to register new. Here is the result:

Quote

I get emailed that I need to confirm my mail address. I have done so. Next message: Registration completed successfully. But when I then want to log in, I get said message.

What should I tell the hoster? Where could be the problem?

The

answer from my hoster:

No problems are visible on the server. The server uses MariaDB and can use InnoDB without any problems.

When a user tries to access the settings of his account, he gets the following error message:

Quote

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

I get the same error message when I try to change or query user data in the admin interface.
What can I do to fix the error?

The forum itself seems to work

Addition:
The error occurs apparently only with individual users! But then both at the user and in the admin area

Thak You! That works!

Hi all!

Is the a way to disable the "Post before register"-feature completely?

Thanx for help

Frank