Crashes game on iOS device/simulator

Crashes game on iOS device/simulator
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#1

I had a old project which was working fine on os x yosemite and xcode 7.3 but when i update my os to Sierra and latest xcode then project is building and signing after launching on device or simulator it is crashing on sprite object which is null but resource is already in project and same thing is working before update. Help me to resolve this if anybody face this issue help me to resolve.
Thanks