`NoMethodError: undefined method `observers=' for ActiveRecord::Base:Class`
Created by: paulmenzel
Following the GitLab Documentation the installation stops at the following step.
root@8cb0ba72d155:/home/git/gitlab# git describe --tags
v8.7.0-rc6
root@8cb0ba72d155:/home/git/gitlab# sudo -u git -H bundle exec rake --trace gitlab:shell:install REDIS_URL=unix:/var/run/redis/redis.sock RAILS_ENV=production
** Invoke gitlab:shell:install (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
NoMethodError: undefined method `observers=' for ActiveRecord::Base:Class
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/attr_encrypted-1.3.4/lib/attr_encrypted.rb:259:in `method_missing'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.6/lib/active_record/dynamic_matchers.rb:26:in `method_missing'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/attr_encrypted-1.3.4/lib/attr_encrypted/adapters/active_record.rb:94:in `method_missing_with_attr_encrypted'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.6/lib/active_record/railtie.rb:108:in `block (3 levels) in <class:Railtie>'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.6/lib/active_record/railtie.rb:107:in `each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.6/lib/active_record/railtie.rb:107:in `block (2 levels) in <class:Railtie>'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/lazy_load_hooks.rb:27:in `each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.6/lib/active_record/railtie.rb:106:in `block in <class:Railtie>'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
/usr/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
/usr/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
/usr/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
/usr/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
/usr/lib/ruby/2.3.0/tsort.rb:347:in `each'
/usr/lib/ruby/2.3.0/tsort.rb:347:in `call'
/usr/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
/usr/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
/usr/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!'
/home/git/gitlab/config/environment.rb:5:in `<top (required)>'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `require'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `block in require'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.6/lib/active_support/dependencies.rb:274:in `require'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:328:in `require_environment!'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:457:in `block in run_tasks_blocks'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:240:in `block in execute'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:235:in `each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:235:in `execute'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
/usr/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:172:in `invoke_with_call_chain'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:201:in `block in invoke_prerequisites'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:199:in `each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:199:in `invoke_prerequisites'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:178:in `block in invoke_with_call_chain'
/usr/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:172:in `invoke_with_call_chain'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/task.rb:165:in `invoke'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:150:in `invoke_task'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:106:in `each'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:106:in `block in top_level'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:115:in `run_with_threads'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:100:in `top_level'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:78:in `block in run'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:176:in `standard_exception_handling'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/lib/rake/application.rb:75:in `run'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/gems/rake-10.5.0/bin/rake:33:in `<top (required)>'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/bin/rake:23:in `load'
/home/git/gitlab/vendor/bundle/ruby/2.3.0/bin/rake:23:in `<main>'
Tasks: TOP => gitlab:shell:install => environment