Hi viktor,
If the code works directly without providing support to compatible with a phpbb style, then it can be the phpbb cache issue. In this issue, you need to remove the phpbb cache to check the changes. Please review the provided documentation about how to remove phpbb cache?
If the code doesn’t work directly without providing support to compatible with a phpbb style, then the code will not work with ForumUS. This is because, ForumUS is not supporting the “adblock detection html code” by default. In this issue, you need to hire someone else to integrate the “adblock detection html code” to get support & make compatible with ForumUS.
Thanks for understanding.
Best Regards,
ThemeLooks Support Team