Whenever I try to go my city, app always crashes

[bassfclef]

I did all you wrote here, but it never worked.

I think 'my first city' has a technical problem. I tried to connect my city with another account(and another device) which I have.

At first It seemed to work well (second account's city is playable now) but soon it crashed whenever it loads my first city.

How can I solve this problem? help me.