I am having this exact same issue. On my other site, I could still see the settings page and just reset my users via bbpress, and that solved the issue.
On this site, I can’t see the reset page. I tried installed reset users plugin but I am afraid to actually use it because this is a woocommerce site and I don’t want to lose customer info.
Is there a way of directly editing the database so I could re-enable my keymasters? Both admins are listed as keymasters, but have no access whatsoever to bbpress.