Moment: Es gibt mehrere Module mit Namen, die sich nur in der Groß-/Kleinschreibung unterscheiden.

WARNING in ./node_modules/moment/locale/en-SG.js
There are multiple modules with names that only differ in casing.
This can lead to unexpected behavior when compiling on a filesystem with other case-semantic.
Use equal casing. Compare these module identifiers:
* /var/www/hint_ui/node_modules/moment/locale/en-SG.js
    Used by 2 module(s), i. e.
    /var/www/hint_ui/node_modules/moment/locale sync /^\.\/.*$/
* /var/www/hint_ui/node_modules/moment/locale/en-sg.js
    Used by 2 module(s), i. e.
    /var/www/hint_ui/node_modules/moment/locale sync /^\.\/.*$/
 @ ./node_modules/moment/locale/en-SG.js
 @ ./node_modules/moment/locale sync ^\.\/.*$
 @ ./node_modules/moment/moment.js
 @ ./node_modules/source-map-loader!./node_modules/vue-loader/lib??vue-loader-options!./src/components/admin/pages/episodes/episode_edit.vue?vue&type=script&lang=js&
 @ ./src/components/admin/pages/episodes/episode_edit.vue?vue&type=script&lang=js&
 @ ./src/components/admin/pages/episodes/episode_edit.vue
 @ ./src/router/admin.js
 @ ./src/router/index.js
 @ ./src/app.js
 @ multi ./src/app.js

für alle Anwendungen nach dem Upgrade.

"moment": "^2.22.2",