Hi,
I moved the forum from a previous hosting to a cloud with virtualmin. Everything went well and the forum worked regularly.
Then I tried to upgrade from version 4.7.6 to version 4.7.18, but I received this error:
We were unable to start a PHP session. You will need to contact your host to adjust your PHP configuration before you can continue. The error reported was: Return type of IPS\_DateTime::format($format, $memberOrLanguage = null) should either be compatible with DateTime::format(string $format): string, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
So I installed the forum (always version 4.7.6) on a test server, I searched the community and tried all the solutions proposed by other users, but I had no success (I changed options in php, I installed the update files manually, I removed all templates and all external applications. Nothing, it doesn't work)
As a last thing I uninstalled everything and tried to install a fresh version, on the test server, and this works regularly.
I would like some suggestions on what to do to bypass this problem and update the forum.
On the server there is php 8.1, I used the checker and everything is green