Were you able to get this resolved? I am running into the same error.
UPDATE: I was able to resolve this, turns out the instance was no longer activated as indicated by the instance logs:
[18:50:17] [Core Error/1] : No valid AMP licence was found. Please open a shell as the ‘amp’ user and run ampinstmgr reactivate to reactivate this instance.
running the reactivate command with the appropriate instance name got everything working for me.