@john.c said:
nd need to be cleared, before re-attempting the update. Checking the logs will help
Just for completeness... it kept doing this after all the typical diagnosis steps. So never found a solution Definitely wasn't cache or disc space related.
In the end I built the XOA from source on the same VM and that worked fine.
Although subsequent to that I've moved XOA to the containerised version thus saving an extra VM!.