TypeError: react_dom__WEBPACK_IMPORTED_MODULE_0__.render is not a function — ReactDOM.render removed in React 19

Your own code — use the root API from react-dom/client:

// Before
import {render, hydrate, unmountComponentAtNode} from 'react-dom';
render(<App />, document.getElementById('root'));
hydrate(<App />, document.getElementById('root'));
unmountComponentAtNode(document.getElementById('root'));

// After
import {createRoot, hydrateRoot} from 'react-dom/client';
const root = createRoot(document.getElementById('root'));
root.render(<App />);
// SSR: hydrateRoot(document.getElementById('root'), <App />);
root.unmount();

Codemod: npx codemod@latest react/19/replace-reactdom-render.

findDOMNode → attach a useRef to the element and read ref.current.

If the call is inside a dependency (stack trace in node_modules), upgrade that library to its React-19-compatible release (leva fixed it in 0.10.0) or stay on React 18 until it does.