My Google Earth Pro license expired. This was entirely my fault as Google Earth does warn you to renewal time is approaching but I hadn't used it for a while and forgot. However, because our firewall blocked part of the transaction process I was unable to renew it immediately.
You'd think, since there is a free version, it would just revert to "free mode" but not so. It refused to load any data until the license was updated. That was rather embarrassing as when it was needed, it was needed!
Once away from the firewall restrictions the renewal took only a few minutes Next time I'll take more notice of those warnings!