The npbackup/npbackup/gui/__main__.py line 547 r"[0-9]{4}-[0-1][0-9]-[0-3][0-9]T[0-2][0-9]:[0-5][0-9]:[0-5][0-9]\..***\+**[0-2][0-9]:[0-9]{2}", This + needs to be + or - I'm in EST which is -04:00