I am getting AFHTTPClient Failed to call designated initializer

I am getting AFHTTPClient Failed to call designated initializer

My code was ok until I downloaded the latest AFNetworking library from
CocoaPods.
Now I am getting:
*** Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: 'AFHTTPClient Failed to call
designated initializer. Invoke `initWithBaseURL:` instead.'
I didn't understand what is wrong.