There is a bug that makes the forum unusable.
Unfortunately I will have to buy another theme.
''PHP Warning: in file [ROOT]/phpbb/di/container_builder.php on line 146: require(./cache/production/autoload_4335734bbdd20f586549a504dff5f80c.php): failed to open stream: No such file or directory''
This error only appears with this theme and not with the standard theme. It is a fatal mistake and makes the forum unusable. The only solution is to empty the production folder.