After updating your react-router-dom NPM you may fetch this error:
export 'Switch' (imported as 'Switch') was not found in 'react-router-dom' (possible exports: AbortedDeferredError, Await, BrowserRouter, Form, HashRouter, Link, MemoryRouter, NavLink, Navigate, NavigationType, Outlet, Route, Router, RouterProvider, Routes, ScrollRestoration, UNSAFE_DataRouterContext, UNSAFE_DataRouterStateContext, UNSAFE_DataStaticRouterContext, UNSAFE_LocationContext, UNSAFE_NavigationContext, UNSAFE_RouteContext, UNSAFE_enhanceManualRouteObjects, createBrowserRouter, createHashRouter, createMemoryRouter, createPath, createRoutesFromChildren, createRoutesFromElements, createSearchParams, defer, generatePath, isRouteErrorResponse, json, matchPath, matchRoutes, parsePath, redirect, renderMatches, resolvePath, unstable_HistoryRouter, useActionData, useAsyncError, useAsyncValue, useFetcher, useFetchers, useFormAction, useHref, useInRouterContext, useLinkClickHandler, useLoaderData, useLocation, useMatch, useMatches, useNavigate, useNavigation, useNavigationType, useOutlet, useOutletContext, useParams, useResolvedPath, useRevalidator, useRouteError, useRouteLoaderData, useRoutes, useSearchParams, useSubmit)
Actually this is a very simple error. But as you have updated NPM you may have this error multiple times in your application. You need to fix them all.
Solution
Update your Switch to Routes
import {Routes} from 'react-router-dom';
......
<Routes>........</Routes>
instead of
import {Switch} from 'react-router-dom';
......
<Switch>........</Switch>
You can find all errors by searching ‘Switch’ in application. And then just replacing them with ‘Routes’ using bulk replace.