Proxmox VM installation issue with writing on HDD

Nextcloud version:
Operating system and version (eg, Ubuntu 20.04): Debian 10 (Proxmox VM)
ncp version: v1.46.7
Fresh install

The issue you are facing:
Fresh install. Mounted the internal HDD as explained in the docs. Logged in with the admin/ncp credentials on the nextcloud. When I upload a file it says: Expected filesize of 766726 bytes but read (from Nextcloud client) and wrote (to Nextcloud storage) 8192 bytes. Could either be a network problem on the sending side or a problem writing to the storage on the server side.

Deleting files is possible.

I think it has to do something with user rights. But I’m not sure what’s the best option. to give the mountpoint 777-rights doesn’t sound like a safe option.
So propably someone here can guide me a little bit.

OK guys, found the solution…

“Hello IT, have you tried turn it off and on again…”

A complete shutdown of the VM and fresh start was the solution so far.