Can’t connect via file app

[gernophil]

Hey everyone I am working on a cluster to that I connect via SSH. Connection via blink commandine works fine, I also added the hosts via config and added a location. Connecting via the alias also works fine. I also can ls folder content. However, I can’t connect via File.app. If I click the location authentication seems to work, but no files are shown. Just a message that translates to „content not available; folder content could not be shown due to an unknown error; retry“. I have to be inside a VPN to connect to HPC. Could this be part of the error?
Thx for your help