When I try to compile to upload a new version of my app to the Appstore, this problem appears:
" "_OBJC_CLASS_$_FIRApp", referenced from: objc-class-ref in AppDelegate.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) "
I've tried everything, the only change I made in my app was to link it to AdMob ... I'm working with Xcode 8.2 and Swift ...
Does anyone have any idea what it can be? someone to whom something similar has happened. Thank you!