LoadError: cannot load such file -- initializer

Doing rake gems:install gives error -

rake aborted!
LoadError: cannot load such file -- initializer
/home/sumitniq/ruby_tutorials/wizardly-examples/config/boot.rb:55:in load_initializer' /home/sumitniq/ruby_tutorials/wizardly-examples/config/boot.rb:38:in run'
/home/sumitniq/ruby_tutorials/wizardly-examples/config/boot.rb:11:in boot!' /home/sumitniq/ruby_tutorials/wizardly-examples/config/boot.rb:110:in <top (required)>'
/home/sumitniq/ruby_tutorials/wizardly-examples/Rakefile:4:in <top (required)>' /home/sumitniq/.rvm/gems/ruby-2.3.3/gems/rake-12.0.0/exe/rake:27:in <top (required)>'
/home/sumitniq/.rvm/gems/ruby-2.3.3/bin/ruby_executable_hooks:15:in eval' /home/sumitniq/.rvm/gems/ruby-2.3.3/bin/ruby_executable_hooks:15:in

'
(See full trace by running task with --trace)

I am new to rails and till now I have used bundle install. Please tell how to resolve this problem. Thanks