herokuのエラーについて

Question

heroku logsとするとエラーが出るのですが、このエラーだと何を解決すればいいのかわからなくて困っております。(おそらくgem周り？)もし解決策をご存知の方がいらっしゃいましたら教えていただきたいです。

2019-04-13T12:36:49.405007+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
2019-04-13T12:36:49.405011+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
2019-04-13T12:36:49.405041+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/connection_specification.rb:191:in `spec'
2019-04-13T12:36:49.405050+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:956:in `establish_connection'
2019-04-13T12:36:49.405052+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_handling.rb:60:in `establish_connection'
2019-04-13T12:36:49.405057+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/railtie.rb:136:in `block (2 levels) in <class:Railtie>'
2019-04-13T12:36:49.405059+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:71:in `instance_eval'
2019-04-13T12:36:49.405061+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:71:in `block in execute_hook'
2019-04-13T12:36:49.405063+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
2019-04-13T12:36:49.405067+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
2019-04-13T12:36:49.405068+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
2019-04-13T12:36:49.405078+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:51:in `each'
2019-04-13T12:36:49.405080+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
2019-04-13T12:36:49.405083+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/base.rb:328:in `<module:ActiveRecord>'
2019-04-13T12:36:49.405085+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.3/lib/active_record/base.rb:27:in `<top (required)>'
2019-04-13T12:36:49.405087+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
2019-04-13T12:36:49.405090+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
2019-04-13T12:36:49.405092+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
2019-04-13T12:36:49.405096+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
2019-04-13T12:36:49.405099+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activestorage-5.2.3/app/models/active_storage/attachment.rb:9:in `<top (required)>'
2019-04-13T12:36:49.405103+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
2019-04-13T12:36:49.405106+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
2019-04-13T12:36:49.405109+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
2019-04-13T12:36:49.405113+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require'
2019-04-13T12:36:49.405117+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:378:in `block in require_or_load'
2019-04-13T12:36:49.405120+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:37:in `block in load_interlock'
2019-04-13T12:36:49.405123+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies/interlock.rb:14:in `block in loading'
2019-04-13T12:36:49.405147+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/concurrency/share_lock.rb:151:in `exclusive'
2019-04-13T12:36:49.405177+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies/interlock.rb:13:in `loading'
2019-04-13T12:36:49.405204+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:37:in `load_interlock'
2019-04-13T12:36:49.405231+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:356:in `require_or_load'
2019-04-13T12:36:49.405257+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:334:in `depend_on'
2019-04-13T12:36:49.405296+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:246:in `require_dependency'
2019-04-13T12:36:49.405324+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:478:in `block (2 levels) in eager_load!'
2019-04-13T12:36:49.405347+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:477:in `each'
2019-04-13T12:36:49.405418+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:477:in `block in eager_load!'
2019-04-13T12:36:49.405442+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:475:in `each'
2019-04-13T12:36:49.405464+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:475:in `eager_load!'
2019-04-13T12:36:49.405487+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/engine.rb:356:in `eager_load!'
2019-04-13T12:36:49.405508+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/application/finisher.rb:69:in `each'
2019-04-13T12:36:49.405536+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
2019-04-13T12:36:49.405559+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `instance_exec'
2019-04-13T12:36:49.405581+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `run'
2019-04-13T12:36:49.405602+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:61:in `block in run_initializers'
2019-04-13T12:36:49.405623+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:228:in `block in tsort_each'
2019-04-13T12:36:49.405644+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
2019-04-13T12:36:49.405664+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:431:in `each_strongly_connected_component_from'
2019-04-13T12:36:49.405685+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:349:in `block in each_strongly_connected_component'
2019-04-13T12:36:49.405707+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:347:in `each'
2019-04-13T12:36:49.405729+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:347:in `call'
2019-04-13T12:36:49.405752+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:347:in `each_strongly_connected_component'
2019-04-13T12:36:49.405776+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:226:in `tsort_each'
2019-04-13T12:36:49.405799+00:00 app[web.1]: from /app/vendor/ruby-2.5.0/lib/ruby/2.5.0/tsort.rb:205:in `tsort_each'
2019-04-13T12:36:49.405823+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/initializable.rb:60:in `run_initializers'
2019-04-13T12:36:49.405845+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/railties-5.2.3/lib/rails/application.rb:361:in `initialize!'
2019-04-13T12:36:49.405868+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2019-04-13T12:36:49.405891+00:00 app[web.1]: from config.ru:3:in `require_relative'
2019-04-13T12:36:49.405914+00:00 app[web.1]: from config.ru:3:in `block in <main>'
2019-04-13T12:36:49.405937+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/rack-2.0.7/lib/rack/builder.rb:55:in `instance_eval'
2019-04-13T12:36:49.405988+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.5.0/gems/rack-2.0.7/lib/rack/builder.rb:55:in `initialize'
2019-04-13T12:36:49.406014+00:00 app[web.1]: from config.ru:in `new'
2019-04-13T12:36:49.406038+00:00 app[web.1]: from config.ru:in `<main>'