Why the "Resource Download Error" msg again and again?

Hi there — sorry to hear you’re running into that error while playing. If your account is linked (so your progress is saved), please try reinstalling the game. Also clear the app cache/data, check your time/date/region settings, free up some storage space, and test on a different network if possible.

Give these steps a try and see if that helps (choose the ones appropriate to your device): 

for iOS

for Android