@Jovial, the certificates are good now, but you using the Admob extension and you get on error on the iOS Admob SDK.
Just do this....
1 - Go to "YOURDOCUMENTFOLDER"/stencylworks/engine-extensions/admob-master/frameworks
2 -Delete GoogleMobileAds.framework
3 -Download the googlemobileadssdkios.zip Framework from
https://developers.google.com/admob/ios/download4 - Unzip googlemobileadssdkios.zip
5 - Open the folder you unzipt, and copy GoogleMobileAds.framework
6 -Go to "YOURDOCUMENTFOLDER"/stencylworks/engine-extensions/admob-master/frameworks again
7 and paste the GoogleMobileAds.framework you just copied.
8 -Run clean project and try to compile
You don't need to have Xcode running on the background....