Fix FileNotFoundError

✅ Solution

FileNotFoundError in Chainlit often arises because the frontend build files are missing from the installed package or source code. To fix it, ensure you've run `chainlit build` in your project directory (if developing from source) or reinstall Chainlit with `pip install chainlit --upgrade` to obtain a complete package with the necessary frontend assets. If using a development install, make sure the frontend is built (`cd frontend && npm install && npm run build`) and linked in the main directory (`chainlit link`).