turns out it was something weird with the wifi SSID and password. I saw with an WIFI analyser that the password was being rejected.
I downgraded the game to a previous version of code where it exposes the password and I could see that the password it was using was a password for an SSID that I had setup for the UK Open and not the SSID I'd used to config with the QR code for my home pinball room. so SSID for UKOpen - was UKOpen with password blah1234 - the new SSID DOMINOSFBB was there but it still had the password blah1234 instead of the password for DOMINOSFBB
I can only assume that the game didn't save the new password correctly. anyway glad it was something simple.
I think if you are using the QR codes to config the game, which historically for me has worked really well with 40+ games in three locations then try putting in the password manually. thanks to folks at Stern for helping me debug this.
Cheers,
Neil.