Undefined symbols for architecture arm64

Question

I am getting a Apple Mach-O Linker Error everytime I import a file from CocoaPods.

Undefined symbols for architecture arm64:
  \"_OBJC_CLASS_$_FBSession\", r         


        

Answer 1

I also encountered the same problem , the above methods will not work . I accidentally deleted the files in the following directory on it .

Folder emplacement:

~/Library/Developer/Xcode/DerivedData/