package-install: Wrong type argument: listp, ";; This package does two things. First, it extends Magit's UI with
;; assorted GitHub-related functionality, similar to the github-gem
;; tool (http://github.com/defunkt/github-gem). Second, it uses
;; Magit's excellent Git library to build an Elisp library for
;; interfacing with GitHub's API.```
it gives me following error