Time Machine stopped working

Running macOS Sequoia 15.3.2, time machine backing up to airport time capsule, airport time capsule is accessible and can pull files/folders from it for normal use. When time machine tries to back up to the time capsule gives an error "An error occurred while starting the backup. Anti-virus software may be preventing Time Machine from writing to the backup."

Do not have any anti-virus software installed. Have tried removing back up location and restarting. Same error. Thanks.