For some reason I am unable to upload .ics files to a newly installed NC23 (on Ubuntu 20.04, Apache). I get a 400 status on the PUT request, Sabre\DAV\Exception\BadRequest. The error message displayed is “Expected filesize of 30684 bytes but read (from Nextcloud client) and wrote (to Nextcloud storage) 0 bytes. Could either be a network problem on the sending side or a problem writing to the storage on the server side.”. This also seems to prevent calendar import in the official calendar app (I can select an ics file, but then nothin happens).
Other files upload just fine.