RVM / Cap / Bundler - bundle install could not find bundler

I'm running Capistrano with RVM, I'm trying to migrate part of our web app to a new server. I've done the cap deploy:setup and cap deploy:check, everything seems to be good. When I run my deploy though Im getting this error

triggering before callbacks for `deploy:finalize_update'
* 2016-02-12 10:48:56 executing `bundle:install'
* executing "cd /u/apps/platform934/releases/20160212174856 && bundle install --gemfile /u/apps/platform934/releases/20160212174856/Gemfile --path /u/apps/platform934/shared/bundle --deployment --quiet --without development test"
 servers: ["192.168.85.144"]
[192.168.85.144] executing command
** [out :: 192.168.85.144] /home/platform934/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:315:in `to_specs': Could not find 'bundler' (>= 0) among 11 total gem(s) (Gem::LoadError)
** [out :: 192.168.85.144] Checked in 'GEM_PATH=/home/platform934/.rvm/gems/ruby-1.9.3-p545@platform934:/home/platform934/.rvm/gems/ruby-1.9.3-p545@global', execute `gem env` for more information
** [out :: 192.168.85.144] from /home/platform934/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:324:in `to_spec'
** [out :: 192.168.85.144] from /home/platform934/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_gem.rb:64:in `gem'
** [out :: 192.168.85.144] from /usr/local/bin/bundle:18:in `<main>'
** [out :: 192.168.85.144] from /usr/local/bin/ruby_executable_hooks1.9.1:15:in `eval'
** [out :: 192.168.85.144] from /usr/local/bin/ruby_executable_hooks1.9.1:15:in `<main>'
command finished in 168ms
*** [deploy:update_code] rolling back
* executing "rm -rf /u/apps/platform934/releases/20160212174856; true"
servers: ["192.168.85.144"]
[192.168.85.144] executing command
command finished in 142ms
failed: "rvm_path=$HOME/.rvm $HOME/.rvm/bin/rvm-shell 'ruby-1.9.3-p545@platform934' -c 'cd /u/apps/platform934/releases/20160212174856 && bundle install --gemfile /u/apps/platform934/releases/20160212174856/Gemfile --path /u/apps/platform934/shared/bundle --deployment --quiet --without development test'" on 192.168.85.144

here is my deploy.rb file.

set :stages,        %w(staging production)¬
¬
set :default_stage, 'production'¬
require 'capistrano/ext/multistage'¬
¬
set :application, "platform934"¬
set :repository,  "git@github.com:foo"¬
set :scm,         :git¬
set :branch,      'master'¬
ssh_options[:forward_agent] = true¬
#set :user, "root"¬
#set :use_sudo, true¬
set :deploy_via, :remote_cache¬
set :ssh_options, { :forward_agent => true}¬
#set :git_enable_submodules, 1¬
default_run_options[:pty] = true¬

# RVM Setup¬
gem 'sass-rails',    '= 3.2.6'¬
#$:.unshift(File.expand_path('./lib', ENV['rvm_path'])) # Add RVM's lib directory to the load path.¬
require "bundler/capistrano"¬
require "rvm/capistrano"
set :rvm_ruby_string,  ENV['GEM_HOME'].gsub(/.*\//,"")¬
#set :rvm_ruby_string, '1.9.3@platform934'¬
set :rvm_type, :user¬
  before 'deploy', 'rvm:install_rvm' #install rvm on target¬
  before 'deploy', 'rvm:install_ruby' #install ruby on target¬
  before 'deploy:setup', 'rvm:install_rvm'¬
  before 'deploy:setup', 'rvm:install_ruby'¬
¬
⋅⋅⋅⋅¬
# Unicorn tasks from: http://blog.teachstreet.com/building-teachstreet/how-i-learned-to-stop-worrying-and-love-the-unicorn/¬
set :unicorn_pid, "#{shared_path}/pids/unicorn.pid"¬
namespace :unicorn do¬
desc "start unicorn"¬
task :start, :roles => :app, :except => { :no_release => true } do¬
run "cd #{current_path} && bundle exec unicorn -c #{current_path}/config/unicorn-#{rails_env}.rb -E #{rails_env} -D"¬
end¬
desc "stop unicorn"¬
task :stop, :roles => :app, :except => { :no_release => true } do¬
  run " kill `cat #{unicorn_pid}`"¬
end¬
desc "graceful stop unicorn"¬
task :graceful_stop, :roles => :app, :except => { :no_release => true } do¬
  run " kill -s QUIT `cat #{unicorn_pid}`"¬
end¬
desc "reload unicorn"¬
task :reload, :roles => :app, :except => { :no_release => true } do¬
  run " sleep 3;  kill -s USR2 `cat #{unicorn_pid}`"¬
end¬
⋅¬
after "deploy:restart", "unicorn:reload"¬
end¬
¬
namespace :rvm do¬
task :trust_rvmrc do¬
 run "rvm rvmrc trust #{release_path}"¬
end¬
after "deploy", "rvm:trust_rvmrc"¬
end¬

I'm not very experienced with rvm, Ive tried installing the gem manually but I don't know how to get it into that directory. I could really use help, I feel like I'm missing something incredibly easy and just cannot find the solution anywhere online that works for me.

RVM doesn't install automatically bundler gem after installing ruby. So each time you'll install a new version of Ruby via RVM you'll have to run gem install bundler command after.

Another solution is to edit your rvmrc configs in ~/.rvmrc or /etc/rvmrc and add rvm_autoinstall_bundler_flag=1

This line will force RVM to install bundler gem and run bundle install if Gemfile available.

Hope it helps :)