Q: I can't login to the iTunes store or to my iCloud music library

I am using a Mac with up to date op system and itunes with the latest update.  I keep getting an error when I try to login to the itunes store.  I also get an error that says unable to login to the icloud music library.  I recently changed my password.  So, I logged out of my account and tried to login again.  Got the same error.  My music library is accessible but I still can't login.