Unable to add a source with url

Question

[!] Unable to add a source with url git@github.com:CocoaPods/Specs.git named master-1. You can try adding it manually in ~/.cocoapods/repos

Answer 1

1. $ cd /Users/username/.cocoapods/repos
2. remove folder master if it exists
   rm -rf master
$ git clone https://github.com/CocoaPods/Specs.git master
3. pod setup

that's all.