After upgrading to Xcode 10.2 I am getting 2 errors
:-1: Unable to load contents of file list: \'xxxxx/Pods/Target Support Files/Pods-xxxx/Pods-xxx
None of the solutions above worked for me. What did the trick was:
Go to Xcode > Project > Info > Configurations
Set the values for Debug > Pods-XXX.debug and Release = Pods-XXX.release
This solved the issue for me on Xcode 12.0 beta