Heyo!
I'm not sure how you're encountering that error since the game is originally meant for PC. (I see that you're running it on Mobile.)
That being said, have you tried starting a new game? I believe there is an issue with continuing from the last update. (I changed how calls are handled to make it easier for myself :D)
By the way, I just ran a test now, and I can confirm that the game is working. (Well, on PC at least. )