generator-jhipster: Problem with i18n in JHipster webapp served on localhost:8080

Overview of the issue

After logging in to localhost:8080, menu items are missing labels, due to language file not being found

Motivation for or Use Case

I generated a new Cassandra project with latest JHipster application. I chose serbian language to be native and english to be the alternative language. When I try to login to the generated webapp on localhost:8080, the following error shows up in console:

GET http://localhost:8080/i18n/undefined.json?buildTimestamp=1524732583467 404 (Not Found)

Reproduce the error

Generate a new monolithic JHipster application with latest JHipster version, then choose two languages, setting one other than english as a native one. Run the backend and try to login to the generated webapp on localhost:8080. Check if menu items have labels and that console is free of 404 errors.

Hitting the browser refresh button, the language file gets served properly and the problem with the 404 console error disappears.

Related issues

none

Suggest a Fix

none

JHipster Version(s)

JHipster Generator v4.14.3

JHipster configuration

Monolithic application Cassandra database Hazelcast caching Serbian (native) & english languages

This is what my yo-rc.json contents look like:

{
  "generator-jhipster": {
    "promptValues": {
      "packageName": "com.package.cassandra",
      "nativeLanguage": "sr"
    },
    "jhipsterVersion": "4.14.3",
    "baseName": "cassandra",
    "packageName": "com.package.cassandra",
    "packageFolder": "com/package/cassandra",
    "serverPort": "8080",
    "authenticationType": "jwt",
    "cacheProvider": "hazelcast",
    "enableHibernateCache": false,
    "websocket": false,
    "databaseType": "cassandra",
    "devDatabaseType": "cassandra",
    "prodDatabaseType": "cassandra",
    "searchEngine": false,
    "messageBroker": false,
    "serviceDiscoveryType": false,
    "buildTool": "maven",
    "enableSocialSignIn": false,
    "enableSwaggerCodegen": false,
    "jwtSecretKey": "4fb3ae16e32811df145c24357ec1f250a1a90fd2",
    "clientFramework": "angularX",
    "useSass": true,
    "clientPackageManager": "yarn",
    "applicationType": "monolith",
    "testFrameworks": [],
    "jhiPrefix": "jhi",
    "enableTranslation": true,
    "nativeLanguage": "sr",
    "languages": [
      "sr",
      "en"
    ]
  }
}

Entity configuration(s) entityName.json files generated in the .jhipster directory

Various entities

Browsers and Operating System

IOS HighSierra Google Chrome