ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-darwin18]
bundler (2.0.1, default: 1.17.2)
rails 5.2.1

$ mina deploy
-----> Creating a temporary build path
-----> Using RVM environment "ruby-2.6.0@test_app"
      Using /home/app_user/.rvm/gems/ruby-2.6.0 with gemset test_app
-----> Cloning the Git repository
      Cloning into bare repository '/var/www/test_app/scm'...
      remote: Enumerating objects: 229, done.
remote: Counting objects: 100% (229/229), done.
remote: Compressing objects: 100% (153/153), done.
remote: Total 3043 (delta 116), reused 149 (delta 75), pack-reused 2814
Receiving objects: 100% (3043/3043), 34.81 MiB | 46.36 MiB/s, done.
Resolving deltas: 100% (1951/1951), done.
-----> Using git branch 'deploy-DO'
      Cloning into '.'...
      done.
-----> Using this git commit
      app_user (626d068):
      > Bundler config
-----> Symlinking shared paths
-----> Installing gem dependencies using Bundler
      Traceback (most recent call last):
        4: from /home/app_user/.rvm/rubies/ruby-2.6.0/bin/ruby_executable_hooks:24:in `<main>'
        3: from /home/app_user/.rvm/rubies/ruby-2.6.0/bin/ruby_executable_hooks:24:in `eval'
        2: from /home/app_user/.rvm/rubies/ruby-2.6.0/bin/bundle:23:in `<main>'
        1: from /home/app_user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems.rb:302:in `activate_bin_path'
      /home/app_user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems.rb:283:in `find_spec_for_exe': Could not find 'bundler' (2.0.1) required by your /var/www/test_app/tmp/build-155639107424949/Gemfile.lock. (Gem::GemNotFoundException)
      To update to the latest version installed on your system, run `bundle update --bundler`.
      To install the missing version, run `gem install bundler:2.0.1`
!     ERROR: Deploy failed.
-----> Cleaning up build
      Unlinking current
      OK
      Connection to 206.81.6.131 closed.

!     Run Error