Rendered layout layouts/application.html.erb (Duration: 1.8ms | Allocations: 983)
2021-12-05T07:57:51.553760+00:00 app[web.1]: I, [2021-12-05T07:57:51.553723 #5] INFO -- : [7101643d-e3f6-44fc-8f81-5b4e42542e97] Completed 500 Internal Server Error in 45ms (ActiveRecord: 5.6ms | Allocations: 2446)
2021-12-05T07:57:51.554362+00:00 app[web.1]: F, [2021-12-05T07:57:51.554328 #5] FATAL -- : [7101643d-e3f6-44fc-8f81-5b4e42542e97]
2021-12-05T07:57:51.554363+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] ActionView::Template::Error (Webpacker can't find application.js in /ideaFrameworks/public/packs/manifest.json. Possible causes:
2021-12-05T07:57:51.554364+00:00 app[web.1]: 1. You want to set webpacker.yml value of compile to true for your environment
2021-12-05T07:57:51.554364+00:00 app[web.1]: unless you are using the webpack -w or the webpack-dev-server.
2021-12-05T07:57:51.554365+00:00 app[web.1]: 2. webpack has not yet re-run to reflect updates.
2021-12-05T07:57:51.554366+00:00 app[web.1]: 3. You have misconfigured Webpacker's config/webpacker.yml file.
2021-12-05T07:57:51.554366+00:00 app[web.1]: 4. Your webpack configuration is not creating a manifest.
2021-12-05T07:57:51.554367+00:00 app[web.1]: Your manifest contains:
2021-12-05T07:57:51.554368+00:00 app[web.1]: {
2021-12-05T07:57:51.554368+00:00 app[web.1]: }
2021-12-05T07:57:51.554368+00:00 app[web.1]: ):
2021-12-05T07:57:51.554369+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 7: <%= csp_meta_tag %>
2021-12-05T07:57:51.554370+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 8:
2021-12-05T07:57:51.554370+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 9: <%= stylesheet_link_tag 'application', media: 'all' %>
2021-12-05T07:57:51.554371+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 10: <%= javascript_pack_tag 'application' %>
2021-12-05T07:57:51.554371+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 11:
2021-12-05T07:57:51.554371+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 12:
2021-12-05T07:57:51.554372+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] 13:
2021-12-05T07:57:51.554372+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97]
2021-12-05T07:57:51.554373+00:00 app[web.1]: [7101643d-e3f6-44fc-8f81-5b4e42542e97] app/views/layouts/application.html.erb:10
といったエラーがおきた
ActionView::Template::Error (Webpacker can't find application.js in /ideaFrameworks/public/packs/manifest.json. Possible causes:
とあったので、
rails webpack:install
heroku run bundle exec rails webpacker:compile
git push heroku master
をして、エラーが解決できた。