error: Unable to resolve build file: XCBCore.BuildFile (missingTargetProductReference(\"3bf83096e50de72a94699e9afc1133ebe3512682230d04680075c283a974e273\")) (in targ
I had correct Command Line Tools and cleaning did nothing for me.
While resolving a merge conflict, A Group named "Recovered References" had appeared in my project navigator. Probably due to a mistake I made during merging. The Group was empty and deleting it fixed my problem.