How odd, this specific event was supposed to be fixed in 9.1. Maybe try going back to 9.1, select a decision, then continuing with 10?
both it and the politician event every so often are acting glitchy not responding to clicks or poping up 3 or 4 times when you click a option.
sometimes it just doesnt let you do any actions sometimes it works fine
Edit: here is a example
After i force crashed the game and reloaded hitting continue it moved on like the event never happend
This, surprisingly, actually worked for me.
While I did had to change hairstyles of some idols to hairstyles that were in the 9.1 version the save did load in the 9.1 version and spawned a different, closeable, event. Then that 9.1 save loaded fine in the 10.0 game and I could continue.
But it really isn't a viable, permanent, solution.