Could not find rake-11.3.0 on deployment (Capistrano Nginx Passenger) - ruby-on-rails

Question

Recently updated an old web app to Rails 4.2.7.1 and Ruby 2.3.1 (It was working with Rails 3 and Ruby 1.9).
App running on an nginx-pasenger server on production with rvm.
Updated RVM and ruby in production, and set new ruby version as
default.
Deployed with Capistrano.
The app is not working, from the nginx log:
[ 2016-12-01 07:00:34.0368 1509/7fbcbf7fe700 agents/HelperAgent/RequestHandler.h:2306 ]: [Client 20] Cannot checkout session because a spawning$
App 6899 stdout:
App 6899 stdout:
[ 2016-12-01 07:01:13.2625 1509/7fbccdf3b700 Pool2/Implementation.cpp:287 ]: Could not spawn process for application /home/deploy/porinstinto/c$
Error ID: 9864a1e8
Error details saved to: /tmp/passenger-error-NDJl0Z.html
Message from application: <p>It looks like Bundler could not find a gem. Maybe you didn't install all the gems that this application needs. T$
<pre class="commands">bundle install</pre>
<p>If that didn't work, then the problem is probably caused by your application being run under a different environment than it's supposed to. $
<ol>
<li>Is this app supposed to be run as the <code>deploy</code> user?</li>
<li>Is this app being run on the correct Ruby interpreter? Below you will
see which Ruby interpreter Phusion Passenger attempted to use.</li>
<li>Please check whether the correct RVM gemset is being used.</li>
<li>Sometimes, RVM gemsets may be broken.
Try resetting them.</li>
</ol>
<p>-------- The exception is as follows: -------</p>
Could not find rake-11.3.0 in any of the sources (Bundler::GemNotFound)
<pre> /home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/spec_set.rb:92:in `block in materialize'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/spec_set.rb:85:in `map!'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/spec_set.rb:85:in `materialize'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/definition.rb:132:in `specs'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/definition.rb:177:in `specs_for'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/definition.rb:166:in `requested_specs'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/environment.rb:18:in `requested_specs'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/runtime.rb:13:in `setup'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler.rb:121:in `setup'
/home/deploy/.rvm/gems/ruby-2.1.3#global/gems/bundler-1.7.3/lib/bundler/setup.rb:17:in `<top (required)>'
/home/deploy/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `require'
/home/deploy/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `rescue in require'
/home/deploy/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:144:in `require'
/usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:263:in `block in run_load_path_setup_code'
/usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:366:in `running_bundler'
/usr/lib/ruby/vendor_ruby/phusion_passenger/loader_shared_helpers.rb:261:in `run_load_path_setup_code'
/usr/share/passenger/helper-scripts/rack-preloader.rb:100:in `preload_app'
/usr/share/passenger/helper-scripts/rack-preloader.rb:158:in `<module:App>'
/usr/share/passenger/helper-scripts/rack-preloader.rb:29:in `<module:PhusionPassenger>'
/usr/share/passenger/helper-scripts/rack-preloader.rb:28:in `<main>'</pre>
[ 2016-12-01 07:01:13.2791 1509/7fbcbf7fe700 agents/HelperAgent/RequestHandler.h:2306 ]: [Client 20] Cannot checkout session because a spawning$
UPDATE
Running "Bundle" in production server I can see that rake-11.3.0 is installed.
Readed suggested link about gemsets.
It seems that all gems are instaled in gemset 2.3.1#default
Seems also, reading error log, that passenger is using ruby-2.1.3#global gemset, wich has no proper gems installed.
Now, I have to change passenger gemset config to use correct "default" gemset. Any help?

Answer 1

try with :
bundle exec rake 'option'

Answer 2

Issue resolved, it was a problem on Nginx-passenger config.
nginx.conf file was pointing to ruby 2.1.3 (a prev version of ruby I used) so I simply replaced this line with:
passenger_ruby /home/deploy/.rvm/wrappers/ruby-2.3.1/ruby;