Ok i check your Xcode here, several thing to mention
What XCode version you have there and what iOS version your device have there.
first thing and important depending the Xcode version
press line Update ...., open dialog and press perform changes to fully update your project.
then cleaning framework
you have plenty of framework here that may cause issue depending the Xcode version to build correctly, so a clean of this is a must
Screen Shot 2019-07-20 at 1.02.12 PM.jpg
also removed any dependencies in CExtLoad.m for chartboost removing the CRunChartBoost.h/m and removing chartboost framework, (BUT this is not important you will have some dead code in you IPA making it bigger non affecting performance) the full cleaning was done here for testing purpose, see that the admob framework is 7.39 as mentioned here in previous post and everything end OK
Screen Shot 2019-07-20 at 12.59.33 PM.jpgScreen Shot 2019-07-20 at 12.57.01 PM.jpg
These two images comes from two different running