railsの本番環境でWe're sorry, but something went wrong.がでてしまう

rails6で本番環境で表示しようとしたらWe're sorry, but something went wrong.が出てしまいました。
ログは

log
1F, [2020-06-12T18:28:49.914525 #12360] FATAL -- : [ce47fe35-83c6-4bbe-90b6-bd6ccbf78ef2]   
2[ce47fe35-83c6-4bbe-90b6-bd6ccbf78ef2] ActionView::Template::Error (Webpacker can't find application in C:/Users/user/Desktop/public-diary/public/packs/manifest.json. Possible causes:
31. You want to set webpacker.yml value of compile to true for your environment
4   unless you are using the `webpack -w` or the webpack-dev-server.
52. webpack has not yet re-run to reflect updates.
63. You have misconfigured Webpacker's config/webpacker.yml file.
74. Your webpack configuration is not creating a manifest.
8Your manifest contains:
9{
10  "application.js": "/packs/js/application-1a8d73fd86577f262f6b.js",
11  "application.js.map": "/packs/js/application-1a8d73fd86577f262f6b.js.map",
12  "entrypoints": {
13    "application": {
14      "js": [
15        "/packs/js/application-1a8d73fd86577f262f6b.js"
16      ],
17      "js.map": [
18        "/packs/js/application-1a8d73fd86577f262f6b.js.map"
19      ]
20    }
21  }
22}
23):
24   8:     <%= stylesheet_link_tag 'diaries', media: 'all', 'data-turbolinks-track': 'reload' %>
25   9:     <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
26   10:     <%= javascript_pack_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
27   11:     <%= stylesheet_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
28   12:     <link href="https://fonts.googleapis.com/css2?family=Kosugi+Maru&display=swap" rel="stylesheet">
29   13:   </head>
30   14: 
31 app/views/layouts/diary.html.erb:11

app\javascript\src\application.scssは

.bootstrap {
    @import '~bootstrap/scss/bootstrap';
}

app\javascript\packs\application.jsは

require("@rails/ujs").start()
require("turbolinks").start()
require("@rails/activestorage").start()
require("channels")
import 'bootstrap'
import '../src/application.scss'

このような感じになっています。

yarnやwebpackerを再インストールしたりrails assets:precompile RAILS_ENV=productionもやりましたが何も変わりませんでした。

なにかわかる方は、コメント回答お願いします。