Error when install fb_graph

[huyn...@gmail.com]

Hello,

When I install fb_graph, I got this error:

Bundler::GemspecError: Could not read gem at /home/huynq/.rvm/gems/ruby-2.0.0-p247/cache/fb_graph-2.7.8.gem. It may be corrupted.

An error occurred while installing fb_graph (2.7.8), and Bundler cannot

continue.

Make sure that `gem install fb_graph -v '2.7.8'` succeeds before bundling.

Can someone help me solve this problem?

Thanks in advance