I try to integrate Fabric/Crashlytics via CocoaPods, my Podfile looks like this:
pod \'Fabric/Core\', \'1.2\' pod \'Fabric/Crashlytics\', \'1.2\'
Try:
Remove Fabric and Crashlytics in podfile.
pod install
Add Fabric and Crashlytics to podfile again
Add Run script like above answer.
Hope it help.