Server stopped accepting new Streams before this stream was established

Using Nextcloud hosted at Hetzner Storage Share. Nextcloud desktop client 14.3 on MacOS 15.0 Sequoia. For a few day snow I have been getting a lot of errors in the desktop client “Server stopped accepting new Streams before this stream was established”. The menu bar icon is always red with a white cross.

Rant on – why do self proclaimed “experts” promote Nextcloud over the big players like Google Drive if I have serious problems like this once a year?? Can I trust there is no data loss? – Rant off.

Regarding the problem I would recommend asking Hetzner - hosting companies offer support for their solutions.

As an “expert” I can tell you there are many reasons to avoid big tech even in case Nextcloud is less polished. and everybody can support e.g. performing testing of new versions, reporting and resolving issues in code and users config.