Based on the error message you're getting (which mentions the Eiffel Tower flag), I'm guessing that's what happening in your case, Paul. Maybe the update took that flag away.
This isn’t a new issue caused by any updates. This has been an issue for a long time
I just made a new tournament for mobile , but made it from this website , using Eiffel Tower flag and tee , no problems .just for info
It’ll probably work on mobile, but on launcher it will most likely crash