title: You have already activated rake 10.1 .1, but your Gemfile requires rake 10.4.2. Prepending `bundle exec` to your comm and may solve this.
body: <p>"You have already activated rake 10.1
  .1, but your Gemfile requires rake 10.4.2. Prepending <code>bundle exec</code> to your comm
  and may solve this. (Gem::LoadError)"
  I am facing this issue. I tried with other existing answers in stachoverflow.
  But still the issue cann't resolve.
  Can anybody suggest..please..</p>
  
  <p>Thanks in advance.</p>