i18next::backendConnector: TypeError: Failed to parse URL

[dcts]

🐛 [Bug Report] Failed to parse URL error log

When integrating i18next into a nextJS app, everything works as expected, unless that everytime a page is loaded (by opening localhost:3000), I get an error message in my server logs. The translation and everything on the frontend still works and all translation JSON files are successfully loaded.

This is the logged error:

i18next::backendConnector: loading namespace translation for language en failed TypeError: Failed to parse URL from /locales/en/translation.json
    at new _Request (node:internal/deps/undici/undici:5057:19)
    at R (/home/dcts/code/dexteronradix/website/node_modules/next/dist/compiled/next-server/app-page.runtime.dev.js:35:340580)
    at doOriginalFetch (webpack-internal:///(rsc)/./node_modules/next/dist/server/lib/patch-fetch.js:380:24)
    at eval (webpack-internal:///(rsc)/./node_modules/next/dist/server/lib/patch-fetch.js:508:20) {
  [cause]: TypeError [ERR_INVALID_URL]: Invalid URL
      at new NodeError (node:internal/errors:405:5)
      at new URL (node:internal/url:637:13)
      at new _Request (node:internal/deps/undici/undici:5055:25)
      at R (/home/dcts/code/dexteronradix/website/node_modules/next/dist/compiled/next-server/app-page.runtime.dev.js:35:340580)
      at doOriginalFetch (webpack-internal:///(rsc)/./node_modules/next/dist/server/lib/patch-fetch.js:380:24)
      at eval (webpack-internal:///(rsc)/./node_modules/next/dist/server/lib/patch-fetch.js:508:20) {
    input: '/locales/en/translation.json',
    code: 'ERR_INVALID_URL'
  }
}

When I check the path localhost:3000/locales/en/translation.json I can access the json file from my browser.

To Reproduce

If there is no obvious explenation to why this is happening I will happily provide a minimal reproducable example.

Expected behavior

No error log in the server logs.

Your Environment

• runtime version: node v18.18.2
• i18next version: "react-i18next": "^14.1.0"
• os: Linux (Ubuntu 22.04 LTS)

[adrai]

You're probably talking about next-i18next...
Yes, please provide an example first.