Thanks a lot for providing this fix.
After upgrading from 3.3.2 to 3.3.3 I had the issue that I could not access the ACP general page. Everything else, including the rest of the ACP was working.
After adding this line of code to phpBB/includes/functions_admin.php as describd in Github I can access the ACP general page again.
But now I see the message " ERROR_DEFAULT_CHARSET ERROR_DEFAULT_CHARSET_EXPLAIN"
What does this mean, and how can that be fixed? Does anyone else have this?
Sorry, if this is the wrong place. I can also create a separate topic for this including the support template, if that is better for you.
Thanks a lot in advance for your support!