Can not clone repository from github | 'localrepository' object has no attribute 'join'

Question

I am a newbie to Linux and recently I have been trying to pull a repository but I keep getting this error:

Error: 'localrepository' object has no attribute 'join' remote: (run with --traceback for stack trace)

I use the command hg pull -u.

When I run the command with --traceback, it gives no error but still the repository is not cloned completely.