I also had this error a few times but eventually I was able to build for iOS. However, I get error when uploading to the AppStore.
ERROR ITMS-90668: "Invalid Bundle Executable. The executable file 'YolNisanlariCL.app/Frameworks/GoogleUtilities.framework/GoogleUtilities' contains incomplete bitcode. To compile binaries with complete bitcode, open Xcode and choose Archive in the Product menu." ERROR ITMS-90668: "Invalid Bundle Executable. The executable file 'YolNisanlariCL.app/Frameworks/MoPub.framework/MoPub' contains incomplete bitcode. To compile binaries with complete bitcode, open Xcode and choose Archive in the Product menu." ERROR ITMS-90668: "Invalid Bundle Executable. The executable file 'YolNisanlariCL.app/Frameworks/nanopb.framework/nanopb' contains incomplete bitcode. To compile binaries with complete bitcode, open Xcode and choose Archive in the Product menu."
I think it might be because of the Appodeal Beta version. Now I am trying to build with the Appodeal Public version.