Please provide the environment you discovered this bug in.

I think I found the origin of the problem: "no platform exist"
This only concerns projects using modules
main.ts

platformBrowser()
  .bootstrapModule(ModulexModule)
  .catch((err) => console.error(err));

vite.config.mts

...
      server: {
        deps: {
          inline: ["@angular/core"],
        },
      },
...

• when i adding inline: ["@angular/core"], ----> "no platform exist" appear on vitest run
• if I don't put this line then vites fails and asks me to put it
• I started from an empty project and I noticed this

Angular 20

angular-vitest-new-brandon.zip
npm i
npm run test:vitest:ui

Which area/package is the issue in?

vite-plugin-angular

Description

No platform exists!

Please provide the exception or error you saw

Other information

No response

I would be willing to submit a PR to fix this issue

• Yes
• No