Hi John, and welcome to the Club!
My first thought is that your battery may be low: These cars need fully charged batteries, and show all sorts of electrical faults if the battery is low. I had such problems on mine a few years ago, but they all went away as soon as I started to keep it fully charged on a CTEK charger.
If yours isn’t used daily, or is mostly used for short runs, that is likely to be your problem.