Backups error out using external hard drive or Time Machine
MacBook Air running Sequoia 15.3.2. Backup to hard drive won't complete; "Time Machine did not finish backing up because some files were unavailable. Backups will resume when your Mac is unlocked."
Mac is not locked, can't find anywhere else to try to unlock. Used to work just fine. Is this a Sequoia glitch? Previous threads indicated wiping items didn't help. What will work? Thanks!
MacBook Air 15″, macOS 15.3