Board Game Arena

I think I finally have figured this out. Make sure it is on PLAY and not ARENA. Sometimes it randomly switches to ARENA and then the 1910 extension is unavailable.

Thanks to thoun for setting me straight on this.

Same. There's just times when the 1910 option does not work. It's there but it won't let me click to turn it on.

I'm wondering the same thing. It's frustrating.