Tried to uninstall CAT 2.1 beta via the program itself, and it wouldn't work. Tried several times. Ended up deleting the app via "app cleaner." Booted to Command + R, turned off SIP, downloaded CAT again and installed. This time, I did not receive any errors. Airdrop and Continuity work. Even though Handoff is checked in general preferences, it isn't working.