Airplay password
My Mac just started asking me for the password to use Airplay to share a video with my TV set. It didn't do this before. Is this new with Catalina 10.15.7, which I just upgraded to? I don't have that password anymore, and can't find it in my Keychain. How can I reset the Airplay or Apple TV password? (I also used to be able to share directly to my TV using Apple TV, without entering any passwords).
iPad Pro, iPadOS 14