uninstalling and re-installing chromium fixed the start up issue. Now all seems in order
Glad to here you got it worked out. I was looking that Openbox error and would not have been sure how to resolve it without some digging…
It was a strange one, in reality the same problem applied to both the extension manager and chromium. It seems something went wrong when I installed both Chromium and Extension manager from the dietpi-software. Extension manager gave me errors at start up and Roon wasn’t able to see it, an uninstall/reinstall fixed it then I discovered Chromium was having issues too so I tried the same uninstall/reinstall approach that worked previously for extension Manager and it started working again.
Writing here down so if happens to someone else they are aware
did you ever get this working? I have the same problem.
No I got no response here that helped so gave up.