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The Designer package and rsuite components package may not work correctly in React 19, for example, if you use webpack/rspack. You may receive the following error: 
Compiled with problems:
ERROR in ./node_modules/rsuite/esm/toaster/render.js 26:4-88
export '__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED' (imported as 'ReactDOM') was not found
in 'react-dom' (possible exports: __DOM_INTERNALS_DO_NOT_USE_OR_WARN_USERS_THEY_CANNOT_UPGRADE,
createPortal, flushSync, preconnect, prefetchDNS, preinit, preinitModule, preload, preloadModule,
requestFormReset, unstable_batchedUpdates, useFormState, useFormStatus, version)
Related issues in rsuite’s GitHub: To fix the error, you need to define CreateRootContextProvider in your application. Here is an example of how to use it: 

const rootEl = document.getElementById('root');
if (rootEl) {
  const root = createRoot(rootEl);
  root.render(
    <React.StrictMode>
      <CreateRootContextProvider value={createRoot}>
        <App/>
      </CreateRootContextProvider>
    </React.StrictMode>,
  );
}
Last modified on April 16, 2026