Songs don't play

Try waiting a few seconds or refreshing the page. If logged in, try logging out and back in.

Login failed

Try refreshing the page (ctrl + r) or hard refreshing (ctrl + shift + r). If login still fails, go to Identity (cmosam.com/identity) and confirm your account still exists by logging into that. If the account does in fact exist, contact Mosaic support on the Mosaic homepage or Docs homepage.