Hi,
just changed my phone from Android 9 to a new one with Android 11, and encounter the bug described in this thread.
Poweramp was restored with all my old settings but was v882 from playstore (and no option in misc to disable legacy filesystem).
After upgrading manually from the website to v888, got the option, disabled it in misc and was able to select my folders and "really" add them (previously, I could see them, and try to add them but nothing was happening).
So now, it's working again, thanks!
