Hi Leo & Sgun - Thanks for that input. I've noticed the Oops error has (for me) been a recent appearance though I can't pin down when it started. It either happens or it doesn't.
For that reason, I would tend to err more towards the suggestion Leo makes re server issue, which I think sounds more probable.
Perhaps this error will resolve itself once we get the new forums. It doesn't appear often with me, but was worth mentioning in case other users had the same. 🆙