@matumu thank you for this suggestion.
I just tried it, however it had no effect so I removed it to be on the safe side.
Rgds.
The 2014 post is an old one, but it does seem sensible and it worked until it crashed WP during the update.
I have removed this snippet and as mentioned WP is working fine.
However, the warning about missing geolocations for venues is of course back.
So is there a safe way to disable these warnings when not using geolocation of events?
Thank you very much for your help. I’ll act upon it.
Rgds.