I have the same issue as Can’t build Firebase v188.8.131.52on iOS
But unfortunately restarting didn’t help.
I want to up this topic cos still need to fix this issue.
I have additional information, how to reporoduce it. I’ve created test project , installed sdkbox Firebase and all worked fine until I’ve added sdkbox Ads+.
Compilation error appears:
Undefined symbols for architecture x86_64:
“OBJC_CLASS$_GULHeartbeatDateStorage”, referenced from:
objc-class-ref in FirebaseCore(FIRHeartbeatInfo.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
After that sdkbox Ads+ removing , sdkbox reverting, project cleaning, drived data deleting, XCode restarting, Mac restarting - anything from it doesn’t helps to avoid this issue.