I can't play on the Frozen Shadows map
Solution 1:
I can think of 2 solutions that might solve your problem.
- Close all other apps - Temple Run 2 might be crashing because of the lack of memory.
Or
- Uninstall and Reinstall - some files might have gotten corrupted.
If you uninstall it however, while using iOS, chances are that you'll lose all your progress even if you backup. So I'd recommend against it. If you're using Android though, follow the steps described in this video to keep your save safe.