Inertia validation redirect to referrer | Inertia.js | Page 1

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The inertia form helper is doing something weird.

Here is my Vue code:

const form = useForm({
  name: '',
});

function register() {
  form.post(route('register'));
}

The register route is a very simple validation check:

# in web.php
Route::post('/register', StoreRegisterController::class)->middleware('guest')->name('register');

# StoreRegisterController.php
class StoreRegisterController
{
    public function __invoke(Request $request)
    {
        $request->validate([
            'name' => 'required|string',
        ]);
    }
}

This should just work, but i'm getting a very weird error (see screenshot)

What is going on here? I'm completely lost.

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More context:

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This is almost a clean Laravel app, I did not mess with middlewares or CORS settings.

#Inertia validation redirect to referrer