ng serve: [vite] (ssr) Error when evaluating SSR module /main.server.mjs: There is a new version of the pre-bundle for "~/project/.angular/cache/20.3.6/project/vite/deps_ssr/@angular_localize_init.js?v=0dd686b6", a page reload is going to ask for it.

[anisabboud]

Command

serve

Is this a regression?

• Yes, this behavior used to work in the previous version

Description

The following error often shows up on ng serve, especially after updating dependencies (running ng serve the first time after ng update):

[vite] (ssr) Error when evaluating SSR module /main.server.mjs: There is a new version of the pre-bundle for ".angular/cache/20.3.6/brainko/vite/deps_ssr/@angular_localize_init.js?v=...", a page reload is going to ask for it.

Minimal Reproduction

Transient error. When stopping the server via Ctrl+C and re-running ng serve, the error is gone.

Exception or Error

2:09:01 PM [vite] (ssr) ✨ new dependencies optimized: @angular/common/locales/global/en
2:09:01 PM [vite] (ssr) ✨ optimized dependencies changed. reloading
2:09:01 PM [vite] (ssr) Error when evaluating SSR module /main.server.mjs: There is a new version of the pre-bundle for "/home/<my-project>/.angular/cache/20.3.6/<my-project>/vite/deps_ssr/@angular_localize_init.js?v=0dd686b6", a page reload is going to ask for it.
2:09:01 PM [vite] Internal server error: There is a new version of the pre-bundle for "/home/<my-project>/.angular/cache/20.3.6/<my-project>/vite/deps_ssr/@angular_localize_init.js?v=0dd686b6", a page reload is going to ask for it.

Your Environment

Angular CLI: 20.3.6 (latest)
Node: 22.16.0
Package Manager: npm 11.5.2
OS: linux x64
    

Angular: 20.3.5 (latest)
... common, compiler, compiler-cli, core, forms, localize
... platform-browser, platform-browser-dynamic, platform-server
... router, service-worker

Package                      Version
------------------------------------
@angular-devkit/architect    0.2003.6
@angular-devkit/core         20.3.6
@angular-devkit/schematics   20.3.6
@angular/build               20.3.6
@angular/cdk                 20.2.9
@angular/cli                 20.3.6
@angular/material            20.2.9
@angular/ssr                 20.3.6
@angular/youtube-player      20.2.9
@schematics/angular          20.3.6
rxjs                         7.8.2
typescript                   5.9.3

Anything else relevant?

The error seems to coincide with ✨ new dependencies optimized: @angular/common/locales/global/en, and could be related to or an evolution of angular/angular#63524.

[anisabboud]

Reproduction steps

1. ng new issue31498 -> Yes to SSR & zoneless
2. Edit angular.json and after "prefix": "app", (line 15) add "i18n": { "sourceLocale": { "code": "en", "subPath": "" } },
3. ng serve -o

Simply copy & paste this in your terminal to get the error:

ng new issue31498 --style=scss --ssr --zoneless --ai-config=none
sed -i 's/"prefix": "app",/"prefix": "app", "i18n": { "sourceLocale": { "code": "en", "subPath": "" } },/' issue31498/angular.json
cd issue31498/ && ng serve -o

[hybrist]

I'll also add that I saw this error after making changes in a new app that wasn't using localization at all.

[alan-agius4]

@jkrems was the error exactly the same? as otherwise it might be an unrelated issue