The error is from a freshly created project.
I can’t find any error showing there is an issue creating the thumbnail in the logs and the thumbnail.png also appears properly in minio for the new project in the meta folder. Not sure if the error is actually caused by the thumbnails, maybe it’s just the first thing QField wants to download ?
Normal file downloading, directly from within the minio webinterface (ssh and then localhost:8010) is working fine. I also opened the manually downloaded projekt and checked if the app packed them properly for QField - it does.
I guess there seems to be a general issue with the downloading process in the QFieldCloud. As uploads and packaging works fine now, but somehow it doesn’t seem to be able to communicate with the outside again.
Thanks for the hint, the Message Log from QField show this:
Yes, we are still using version v0.32.5. I know it is outdated, but we started developing the hosting when this version was the latest. We want to get everything up and running first before we perform an update. It is only a side project, so development is progressing very slowly.