Integrated editor cannot save

Hi,
I have a docker installation (V8.0.7). The integrated editor cannot save changed txt-files. Pressing the save-button leads to progress dots only.
Any ideas?
thanks

Hi,
I’ve solved this issue.
It turned out to be a wrong entry for FILE_SERVER_ROOT.
The docker stack is published via a Firewall using port 8443 for https. I had to configure the same port for FILE_SERVER_ROOT.
These settings work:
SERVICE_URL: https://sf.domain.com:8443
FILE_SERVER_ROOT: https://sf.domain.com:8443/seahttp