The maintenance is over.
News from Oct 13, 2020
During the maintenance the Gitlab instance will be wholly unreachable and will not show the usual static website announcing maintenance.
Edit (14.10. 13:22): The upgrade to 13.4 has been done and we have migrated the storage backend. If you notice any problems, please let us know on Matrix or at firstname.lastname@example.org.
Edit (14.10. 16:50): We changed the authentication backend now as well. If you encounter any problems logging in, please let us know on Matrix or at email@example.com.