Okay I have think cause of that :
UNCAUGHT EXCEPTION (NSInvalidArgumentException): -[__NSCFBoolean mutableCopyWithZone:]: unrecognized selector sent
This says that the selector provided for mutableCopyWithZone is not known.
because usually this is the system call:
I believe your problem is that you deleted your Xcode 12 incorrectly. or haven’t At all.
try deleting your Xcode 12 with some sort of app uninstaller . That should work
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: