NamelessMC

Same error

When I register comes a fatal error and when I reload the page comes that:

If I look in the panel for the user, he is also there, but it comes just when registering this error:

Nameless Version: 2.1.1

cache/logs/fatal-log.log:
[2023-08-21, 11:35:48] C:\xampp\htdocs\core\classes\Database\DB.php(253): SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`forum`.`nl2_users_groups`, CONSTRAINT `nl2_users_groups_ibfk_2` FOREIGN KEY (`group_id`) REFERENCES `nl2_groups` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)

nl2_groups: (DATABASE)

My problem was:

 php8.0-mbstring

Hello,

When i click on a user on the panel to edit him.
I get a full white screen.

And when i show on the last errors, i found this:

I found the Problem.

sudo apt install php8.0-xml