Hi again. I found the solution on this post:/p> I am agree with @sburlot: disabling RSS is confusing. Thank you for your support.

Hi! I will try to explain myself in more detail. I have created a single forum. In its settings, following "Dashboard > Boards > Settings &g...

This is a screenshot of the board settings page. As you can see, there is no "Forum Feed/RSS" option.  wpforo-board-settings.jpg