/opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:6:in `<module:FolderContact>': Mapping is not a module (TypeError)
from /opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:5:in `<module:Exchange>'
from /opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:4:in `<module:Import>'
from /opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:3:in `<class:Unit>'
from /opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:2:in `<class:Sequencer>'
from /opt/zammad/lib/sequencer/unit/import/exchange/folder_contact/mapping/from_config.rb:1:in `<top (required)>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `block in require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:258:in `load_dependency'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from /opt/zammad/lib/mixin/required_sub_paths.rb:35:in `block in eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:26:in `each'
from /opt/zammad/lib/mixin/required_sub_paths.rb:26:in `eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:40:in `block in eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `each'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:40:in `block in eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `each'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:40:in `block in eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `each'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:40:in `block in eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `each'
from /opt/zammad/lib/mixin/required_sub_paths.rb:39:in `eager_load_recursive'
from /opt/zammad/lib/mixin/required_sub_paths.rb:7:in `included'
from /opt/zammad/lib/sequencer/unit.rb:5:in `include'
from /opt/zammad/lib/sequencer/unit.rb:5:in `<class:Unit>'
from /opt/zammad/lib/sequencer/unit.rb:4:in `<class:Sequencer>'
from /opt/zammad/lib/sequencer/unit.rb:3:in `<top (required)>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `block in require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:258:in `load_dependency'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:379:in `block in require_or_load'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:36:in `block in load_interlock'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies/interlock.rb:12:in `block in loading'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/concurrency/share_lock.rb:149:in `exclusive'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies/interlock.rb:11:in `loading'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:36:in `load_interlock'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:357:in `require_or_load'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:335:in `depend_on'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:251:in `require_dependency'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:476:in `block (2 levels) in eager_load!'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:475:in `each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:475:in `block in eager_load!'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:473:in `each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:473:in `eager_load!'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/engine.rb:354:in `eager_load!'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/application/finisher.rb:67:in `each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/application/finisher.rb:67:in `block in <module:Finisher>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/initializable.rb:30:in `instance_exec'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/initializable.rb:30:in `run'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/initializable.rb:59:in `block in run_initializers'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:228:in `block in tsort_each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:347:in `each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:347:in `call'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:347:in `each_strongly_connected_component'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:226:in `tsort_each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/2.4.0/tsort.rb:205:in `tsort_each'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/initializable.rb:58:in `run_initializers'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/application.rb:353:in `initialize!'
from /opt/zammad/config/environment.rb:5:in `<top (required)>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `block in require'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:258:in `load_dependency'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/activesupport-5.1.5/lib/active_support/dependencies.rb:292:in `require'
from config.ru:3:in `block in <main>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/builder.rb:55:in `instance_eval'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/builder.rb:55:in `initialize'
from config.ru:in `new'
from config.ru:in `<main>'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/builder.rb:49:in `eval'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/builder.rb:49:in `new_from_string'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/builder.rb:40:in `parse_file'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/server.rb:319:in `build_app_and_options_from_config'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/server.rb:219:in `app'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands/server/server_command.rb:24:in `app'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/server.rb:354:in `wrapped_app'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/rack-2.0.5/lib/rack/server.rb:283:in `start'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands/server/server_command.rb:44:in `start'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands/server/server_command.rb:135:in `block in perform'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands/server/server_command.rb:130:in `tap'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands/server/server_command.rb:130:in `perform'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/command/base.rb:63:in `perform'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/command.rb:44:in `invoke'
from /opt/zammad/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/railties-5.1.5/lib/rails/commands.rb:16:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'