error installing plugin

[koren85]

Hello.
An error occurs during the installation of the plug-in on the Redmine version 3.4 implementation of docker.
Error log below:

redmine_1 | Installing plugins...
redmine_1 | Installing gems required by plugins...
redmine_1 | Migrating plugins. Please be patient, this could take a while...
redmine_1 | rake aborted!
redmine_1 | can't modify frozen Array
redmine_1 | /home/redmine/redmine/plugins/redmine_synchrony/init.rb:3:in <top (required)>' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in block in require'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:240:in load_dependency' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in require'
redmine_1 | /home/redmine/redmine/lib/redmine/plugin.rb:155:in block in load' redmine_1 | /home/redmine/redmine/lib/redmine/plugin.rb:146:in each'
redmine_1 | /home/redmine/redmine/lib/redmine/plugin.rb:146:in load' redmine_1 | /home/redmine/redmine/config/initializers/30-redmine.rb:21:in <top (required)>'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:268:in load' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:268:in block in load'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:240:in load_dependency' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:268:in load'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/engine.rb:652:in block in load_config_initializer' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/notifications.rb:166:in instrument'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/engine.rb:651:in load_config_initializer' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/engine.rb:616:in block (2 levels) in class:Engine'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/engine.rb:615:in each' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/engine.rb:615:in block in class:Engine'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:30:in instance_exec' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:30:in run'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:55:in block in run_initializers' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:44:in each'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:44:in tsort_each_child' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/initializable.rb:54:in run_initializers'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/application.rb:352:in initialize!' redmine_1 | /home/redmine/redmine/config/environment.rb:14:in <top (required)>'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in require'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in block in require' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:240:in load_dependency'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in require' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/application.rb:328:in require_environment!'
redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/railties-4.2.11/lib/rails/application.rb:457:in block in run_tasks_blocks' redmine_1 | /home/redmine/redmine/vendor/bundle/ruby/2.3.0/gems/rake-12.3.2/exe/rake:27:in <top (required)>'
redmine_1 | Tasks: TOP => redmine:plugins:migrate => environment

[mboremski]

same issue here on redmine 4.0.4