Internal server error: Failed to resolve import "@/components/ui/button" from "src/App.tsx". Does the file exist?

[MarceloGomesProjetos]

This is probably not the first time someone has done this.
npx shadcn@latest init
✔ Preflight checks.
✔ Verifying framework. Found Vite.
✖ Validating Tailwind CSS config. Found v4.
✔ Validating import alias.

No Tailwind CSS configuration found at C:\ProjetosTypeScripts\LeilaoReverso\wwwroot.
It is likely you do not have Tailwind CSS installed or have an invalid configuration.
Install Tailwind CSS then try again.
Visit https://tailwindcss.com/docs/guides/vite to get started.