ARTINU

The app didn’t start.

The page loaded but the application never mounted. The reason is usually one of these, in this order.

1. The dev server is not running. In a terminal at the project folder: npm install then npm run dev, and open the http://localhost:5173 address it prints. Opening index.html from the folder will never work.
2. The API is not up. Open http://localhost:4000/api/health in a tab — it should return JSON.
3. A stale cache. Hard reload with Ctrl + Shift + R.
4. An extension is blocking it. Brave shields or uBlock on localhost; a private window rules this out.

No error was captured — the module simply never ran.