Running 1.5.1, when trying to update to 1.5.2 from update manager, I get the error:
"Update not started!
The update could not be started. Is it already active? Please consult octoprint.log for details."
I can't find anything obvious in the logs. I have restarted the rPi several times with the same issue.
I tried safe mode, with the same error
Octoprint.log here: https://pastebin.com/K8M1LeKs