I’m not sure yet, the actual error that you have there is only about the feed on dashboard, which if wasn’t changed is slightly odd that your CMS can’t get it.
Regarding the bootstrap-select error, that’s also rather odd, this file should exist in the installation (unless you have something blocking js /jQuery perhaps?)
I assume you’ve followed Alex’s guide about docker? Xibo 1.8.0 with Docker on Ubuntu 16.04
Are all containers running (
docker ps -a) with correct permissions?
docker-compose log show?
Although spinning cogs usually imply php issues, I’m not sure yet.