Bundler could not find compatible versions for gem “rails” , manual and package install both doesn't work
<p>I tried to install a plugin (like emoji) mannually.
But it showed "Bundler could not find compatible versions for gem 'rails' ".</p>

<p>I tried many solutions I can found on the internet , like deleting the Gemfile.lock and doing bundle install.
But still, it doesn't work for me.</p>

<p>Then I tried to install it by package.
But still, the same problem occurs.</p>

<p>I don't know how to resolve it.</p>

<p><strong>Command message:</strong></p>

<pre><code>[openproject] ./bin/configure
[legacy-installer] ./bin/preinstall
[mysql] ./bin/preinstall
[apache2] ./bin/preinstall
[repositories] ./bin/preinstall
[smtp] ./bin/preinstall
[memcached] ./bin/preinstall
No memcached server to install. Skipping.
[openproject] ./bin/preinstall
[legacy-installer] ./bin/postinstall
[mysql] ./bin/postinstall
Generating /etc/openproject/conf.d/database...
[apache2] ./bin/postinstall
[repositories] ./bin/postinstall
[smtp] ./bin/postinstall
[memcached] ./bin/postinstall
[openproject] ./bin/postinstall
You are replacing the current local value of frozen, which is currently "1"
The git source `git://github.com/omniauth/omniauth-saml.git` uses the `git` protocol, which transmits data without encryption. Disable this warning with `bundle config git.allow_insecure true`, or switch to the `https` protocol to keep your data secure.
Warning: the running version of Bundler (1.13.2) is older than the version that created the lockfile (1.13.6). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
Fetching https://github.com/tessi/openproject-emoji.git
Fetching https://github.com/finnlabs/omniauth-openid-connect.git
Fetching https://github.com/finnlabs/omniauth-openid_connect-providers.git
Fetching https://github.com/finnlabs/openproject-auth_saml
Fetching git://github.com/omniauth/omniauth-saml.git
Fetching https://github.com/opf/openproject-translations.git
Fetching https://github.com/goodwill/capybara-select2
Fetching https://github.com/rails/rails-controller-testing/
Fetching https://github.com/finnlabs/rspec-example_disabler.git
Fetching https://github.com/rspec/rspec-activemodel-mocks
Fetching https://github.com/carrierwaveuploader/carrierwave
Fetching https://github.com/finnlabs/transactional_lock.git
Fetching https://github.com/opf/rails-angular-xss
Fetching https://github.com/norman/friendly_id
Fetching https://github.com/oliverguenther/omniauth
Fetching https://github.com/globalize/globalize
Fetching gem metadata from https://rubygems.org/.......
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Resolving dependencies.............
Bundler could not find compatible versions for gem "rails":
In snapshot (Gemfile.lock):
rails (= 5.0.0.1)

In Gemfile:
health_check was resolved to 2.2.1, which depends on
  rails (&gt;= 4.0)

openproject-openid_connect was resolved to 6.1.0, which depends on
  lobby_boy (~&gt; 0.1) was resolved to 0.1.2, which depends on
    rails (&gt;= 3.2.21)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-auth_plugins was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0)

openproject-emoji was resolved to 5.0.0, which depends on
  rails (~&gt; 4.2.4)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

openproject-translations was resolved to 6.1.0, which depends on
  rails (~&gt; 5.0.0)

rails-angular-xss was resolved to 0.2.0.pre.pre, which depends on
  rails (&lt; 5.1, &gt;= 5.0.0)

rails_autolink (~&gt; 1.1.6) was resolved to 1.1.6, which depends on
  rails (&gt; 3.1)

Running `bundle update` will rebuild your snapshot from scratch, using only the gems in your Gemfile, which may resolve the conflict.
</code></pre>

<p><strong>Gemgile.custom</strong></p>

<pre><code>gem 'openproject-emoji', git: 'https://github.com/tessi/openproject-emoji.git', :branch =&gt; 'op-5-stable'
</code></pre>

<p><strong>Gemgile:</strong></p>

<pre><code>#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

source 'https://rubygems.org'

ruby '&gt;= 2.2.5'

gem 'rails', '&gt;=5.0.0'
gem 'actionpack-xml_parser', '~&gt; 2.0.0'
gem 'activemodel-serializers-xml', '~&gt; 1.0.1'
gem 'activerecord-session_store', '~&gt; 1.0.0'
gem 'responders', '~&gt; 2.3'

gem 'coderay', '~&gt; 1.1.0'
gem 'rubytree', '~&gt; 0.9.7'
gem 'rdoc', '&gt;= 2.4.2'

gem 'globalize', git: 'https://github.com/globalize/globalize', ref: '38443bcd'
gem 'omniauth', git: 'https://github.com/oliverguenther/omniauth', ref: '8385bc0'
gem 'request_store', '~&gt; 1.3.1'
gem 'gravatar_image_tag', '~&gt; 1.2.0'

gem 'warden', '~&gt; 1.2'
gem 'warden-basic_auth', '~&gt; 0.2.1'

# TODO: adds #auto_link which was deprecated in rails 3.1
gem 'rails_autolink', '~&gt; 1.1.6'
gem 'will_paginate', '~&gt; 3.1.0'
gem 'acts_as_list', '~&gt; 0.8.1'
gem 'acts_as_tree', '~&gt; 2.5.1'


gem 'friendly_id', git: 'https://github.com/norman/friendly_id', ref: 'aff05645' # '~&gt; 5.1.0'

gem 'awesome_nested_set', '~&gt; 3.1.1'

gem 'color-tools', '~&gt; 1.3.0', require: 'color'

gem 'ruby-progressbar'

# Provide timezone info for TZInfo used by AR
gem 'tzinfo-data', '~&gt; 1.2016.1'

# to generate html-diffs (e.g. for wiki comparison)
gem 'htmldiff'

# Generate url slugs with #to_url and other string niceties
gem 'stringex', '~&gt; 2.6.1'

# generates SVG Graphs
# used for statistics on svn repositories
gem 'svg-graph', '~&gt; 2.0.1'

gem 'date_validator', '~&gt; 0.9.0'
gem 'ruby-duration', '~&gt; 3.2.0'

# provide compatible filesystem information for available storage
gem 'sys-filesystem', '~&gt; 1.1.4', require: false

gem 'bcrypt', '~&gt; 3.1.6'

# We rely on this specific version, which is the latest as of now (end of 2016),
# because we have to apply to it a bugfix which could break things in other versions.
# This can be removed as soon as said bugfix is integrated into rabl itself.
# See: config/initializers/rabl_hack.rb
gem 'rabl', '~&gt; 0.13.0'
gem 'multi_json', '~&gt; 1.12.1'
gem 'oj', '~&gt; 2.17.4'

gem 'delayed_job_active_record', '~&gt; 4.1.1'
gem 'daemons'

gem 'rack-protection', '~&gt; 2.0.0.beta2'

# Rack::Attack is a rack middleware to protect your web app from bad clients.
# It allows whitelisting, blacklisting, throttling, and tracking based
# on arbitrary properties of the request.
# https://github.com/kickstarter/rack-attack
gem 'rack-attack', '~&gt; 5.0.1'

# Patch Rails HTML whitelisting for Angular curly braces
gem 'rails-angular-xss', git: 'https://github.com/opf/rails-angular-xss', ref: '5f5622e'

gem "syck", '~&gt; 1.0.5', require: false
gem 'gon', '~&gt; 4.0'

# catch exceptions and send them to any airbrake compatible backend
# don't require by default, instead load on-demand when actually configured
gem 'airbrake', '~&gt; 5.1.0', require: false

gem 'transactional_lock', git: 'https://github.com/finnlabs/transactional_lock.git',
                      branch: 'master'

gem 'prawn', '~&gt; 2.1'
gem 'prawn-table', '~&gt; 0.2.2'

gem 'cells-rails', '~&gt; 0.0.6'
gem 'cells-erb', '~&gt; 0.0.8'

group :production do
# we use dalli as standard memcache client
# requires memcached 1.4+
# see https://github.clientom/mperham/dalli
gem 'dalli', '~&gt; 2.7.6'

# Unicorn worker killer to restart unicorn child workers
gem 'unicorn-worker-killer', require: false
end

gem 'sprockets', '~&gt; 3.7.0'
gem 'sass-rails', '~&gt; 5.0.6'
gem 'sass', '~&gt; 3.4.12'
gem 'autoprefixer-rails', '~&gt; 6.4.1'
gem 'bourbon', '~&gt; 4.2.0'
gem 'i18n-js', '&gt;= 3.0.0.rc13'

# small wrapper around the command line
gem 'cocaine', '~&gt; 0.5.8'

# required by Procfile, for deployment on heroku or packaging with packager.io.
# also, better than thin since we can control worker concurrency.
gem 'unicorn'

gem 'nokogiri', '~&gt; 1.6.8'

# carrierwave 0.11.3 should allow to use fog-aws without the rest of the
# fog dependency chain. We only need aws here, so we can avoid it
# at the cost of referencing carrierwave#master for now.
gem 'fog-aws'
gem 'carrierwave', git: 'https://github.com/carrierwaveuploader/carrierwave', branch: 'master'

group :test do
gem 'rack-test', '~&gt; 0.6.3'
gem 'shoulda-context', '~&gt; 1.2'
gem 'launchy', '~&gt; 2.4.3'

# Require factory_girl for usage with openproject plugins testing
# FactoryGirl needs to be available when loading app otherwise factory
# definitions from core are not available in the plugin thus specs break
gem 'factory_girl', '~&gt; 4.5'
# require factory_girl_rails for convenience in core development
gem 'factory_girl_rails', '~&gt; 4.7', require: false

  gem 'cucumber', '~&gt; 2.4.0'
  gem 'cucumber-rails', '~&gt; 1.4.4', require: false
  gem 'rack_session_access'
  gem 'database_cleaner', '~&gt; 1.5.3'
  gem 'rspec', '~&gt; 3.5.0'
  # also add to development group, so "spec" rake task gets loaded
  gem 'rspec-rails', '~&gt; 3.5.2', group: :development
  gem 'rspec-activemodel-mocks', '~&gt; 1.0.3', git: 'https://github.com/rspec/rspec-activemodel-mocks'

  # Retry failures within the same environment
  gem 'rspec-retry', '~&gt; 0.5.2'
  gem 'retriable', '~&gt; 2.1'

  gem 'rspec-example_disabler', git: 'https://github.com/finnlabs/rspec-example_disabler.git'
  gem 'rspec-legacy_formatters', '~&gt; 1.0.1', require: false

  # brings back testing for 'assigns' and 'assert_template' extracted in rails 5
  # TODO: 1.0.1 still contains an issue that breaks helper inclusion in view specs
  # Constrain value once new version released.
  # More information: https://github.com/rspec/rspec-rails/issues/1644
  gem 'rails-controller-testing', git: 'https://github.com/rails/rails-controller-testing/'

  gem 'capybara', '~&gt; 2.8.1'
  gem 'capybara-screenshot', '~&gt; 1.0.14'
  gem 'fuubar', '~&gt; 2.2.0'
  gem 'capybara-select2', git: 'https://github.com/goodwill/capybara-select2', ref: '585192e'
  gem 'capybara-ng', '~&gt; 0.2.7'
  gem 'selenium-webdriver', '~&gt; 2.53.4'
  gem 'timecop', '~&gt; 0.8.1'
  gem 'webmock', '~&gt; 2.1.0', require: false

  gem 'simplecov', '~&gt; 0.12.0', require: false
  gem 'shoulda-matchers', '~&gt; 3.1', require: nil
  gem 'json_spec', '~&gt; 1.1.4'
  gem 'codecov', '~&gt; 0.1.5', require: nil
  gem 'equivalent-xml', '~&gt; 0.6'

  gem 'parallel_tests', '~&gt; 2.4.1'
end

group :ldap do
  gem 'net-ldap', '~&gt; 0.14.0'
end

group :development do
  gem 'letter_opener'
  gem 'faker'
  gem 'livingstyleguide', '~&gt; 2.0.1'

  # Pry seems to cause a lot of segfaults in the tests.
  # Therefore, it has been removed from the :test group for now.
  # Reevaluate once newer versions of pry have been released.
  gem 'pry-rails', '~&gt; 0.3.4'
  gem 'pry-stack_explorer', '~&gt; 0.4.9.2'
  gem 'pry-rescue', '~&gt; 1.4.4'
  gem 'pry-byebug', '~&gt; 3.4.0', platforms: [:mri]
  gem 'pry-doc', '~&gt; 0.9.0'

  gem 'rubocop'
end

group :development, :test do
  gem 'thin', '~&gt; 1.7.0'
end

# API gems
gem 'grape', '~&gt; 0.17'
gem 'grape-cache_control', '~&gt; 1.0.1'

gem 'roar',   '~&gt; 1.0.0'
gem 'reform', '~&gt; 1.2.6', require: false

platforms :mri, :mingw, :x64_mingw do
  group :mysql2 do
    gem 'mysql2', '~&gt; 0.4.4'
  end

  group :postgres do
    gem 'pg', '~&gt; 0.19.0'
  end
end

platforms :jruby do
  gem 'jruby-openssl'

  group :mysql do
    gem 'activerecord-jdbcmysql-adapter'
  end

  group :postgres do
    gem 'activerecord-jdbcpostgresql-adapter'
  end
end

group :opf_plugins do
  gem 'openproject-translations', git: 'https://github.com/opf/openproject-translations.git', branch: 'dev'
end

# TODO: Make this group :optional when bundler v10.x
# is matured enough that we can use this everywhere
# http://bundler.io/blog/2015/06/24/version-1-10-released.html
group :docker do
  gem 'passenger'

  # Used to easily precompile assets
  gem 'sqlite3', require: false
  gem 'rails_12factor', require: !!ENV['HEROKU']
  gem 'health_check', require: !!ENV['HEROKU']
  gem 'newrelic_rpm', require: !!ENV['HEROKU']
end

# Load Gemfile.local, Gemfile.plugins, plugins', and custom Gemfiles
gemfiles = Dir.glob           File.expand_path('../{Gemfile.local,Gemfile.plugins,lib/plugins/*/Gemfile}',
                                 __FILE__)
gemfiles &lt;&lt; ENV['CUSTOM_PLUGIN_GEMFILE'] unless     ENV['CUSTOM_PLUGIN_GEMFILE'].nil?
gemfiles.each do |file|
  next unless File.readable?(file)
  eval_gemfile(file)
end
</code></pre>

<p>I tried to install other plugin.
reference:<a href="https://www.openproject.org/open-source/plugins/install-plugins-manual/" rel="nofollow noreferrer">https://www.openproject.org/open-source/plugins/install-plugins-manual/</a></p>

<pre><code># Required by backlogs
gem "openproject-pdf_export", git: "https://github.com/finnlabs/openproject-pdf_export.git", :branch =&gt; "stable/5"

gem "openproject-backlogs", git: "https://github.com/finnlabs/openproject-backlogs.git", :branch =&gt; "stable/5"
</code></pre>

<p>But the issue is same.</p>