Thanks so much for the prompt reply. I did as you suggested and then reactivated the plugin so I could record the error and it’s worked fine ever since!
The only remaining issue I’m having is that the time message (it’s Thursday at 4pm etc) isn’t updating for non-logged in users. I’m assuming this is a caching thing which would be rectified by the pro version? Can I very cheekily ask whether there would be a charity/non-profit discount available for that please?