Hi Squid -
I'm seeing the same issue as bdydrp on a server that was just upgraded from 5.x to 6.1.7 that I'm helping a friend with. When I choose to add a docker from CA (any docker) I get the same basic screen as if I clicked "Add container" on the docker tab.
After the initial start of unRAID 6.1.7 I enabled docker, then installed CA. Installing plugins works fine, but not dockers. I have not yet rebooted since starting unraid 6.1.7. I seem to recall seeing this on another server I set up but I had to reboot for other reasons and following that there was no issue.
The URL(s) in the new "AddContainer" tab look like:
http://192.168.1.10/AddContainer?xmlTemplate=default:/var/lib/docker/unraid/templates-community-apps/94.xml
http://192.168.1.10/AddContainer?xmlTemplate=default:/var/lib/docker/unraid/templates-community-apps/124.xml
I looked in the directory specified and it doesn't exist - see below:
root@pinta:~# ls -l /var/lib/docker/unraid
total 0
drwxrwxrwx 1 root root 100 Jan 24 20:45 community.applications.datastore/
root@pinta:~#
When I check another server which is working, I see the /var/lib/docker/unraid/templates-community-apps directory which is full of XML files.
Hope that helps track down the issue! Let me know if there's anything else I can grab to help out.
Thanks
Update: I manually created that directory then clicked "Update Applications" and it's working as expected.