put error boundary around the groups page

src/navigation/Router.tsx

@@ -85,7 +85,11 @@ export default function Router(props: Props) {
         <Routes>
           <Route
             path="/" 
-            element={<GroupsPage />}
+            element={
+              <ErrorBoundary FallbackComponent={ErrorFallback}>
+                <GroupsPage />
+              </ErrorBoundary>
+            }
           />
           <Route
             path="/:groupID"