PHP errors in 8.1

Hello

After updating the PHP to 8.1, I am getting PHP errors from Plugin: wp-user-manager.

Deprecated – Return type of WPUM\Carbon_Fields\Pimple\Container::offsetExists($id) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

trim(): Passing null to parameter #1 ($string) of type string is deprecated

There is total 24 deprecated PHP errors in this plugin.

Please check it.