Nextcloud is currently borked.
In order to fix a problem with a php module core dumping in rainloop, I attempted to upgrade to php7.3. Everything worked except nextcloud (and possibly owncloud, did not test). I attempted to update nextcloud to 14.04 beta. Still borked. Went back to php7.2, nextcloud 14.04 does not work under either version and downgrading is not supported so not sure exactly how I’m going to restore. May have to copy old files off of backup but leave everything else current. At any rate it’s broken at the moment.