App Close Right After I Open It (ios)

I try to update a game, and i have some problems with it.
My game was rejected, because they can't open it .
So i start use testflight, and guess.... my game start , show spalsh screen, then close , it seems watchdog close it, because it took to much to launch it .
I use Last version of MAC and lXcode 7.2.1, then i use Xcode 8.2.1 , then Xcode 8.3 , now i download Xcode 8.3.1 .
On simulator or testflight (Iphone 5) the same results .
And entire scheme is selected for release , and i added also App Uses Non-Exempt Encryption - false
Is first time when i use Testflight , anyone use Testflight ?
How we test app before launch ?

 

Check what it says in the log. Pretty sure it's a memory issue based on too many atlases.

 

I didnt touch the game, just want to remove ads, thats all

 

Update....I delete all certificates and provision files, and now it's work fine iOS 10.3.1 , Xcode 7.2.1