Try marking React 18’s react-dom/client as external

packages/integrations/react/client.js

@@ -7,7 +7,7 @@ const usingReact18 = version.startsWith('18.');
 // Import the correct hydration method based on the version of React.
 const hydrateFn = (
 	async () => usingReact18
-		? (await import('react-dom/client')).hydrateRoot
+		? (await import('react-dom/client.js')).hydrateRoot
 		: (await import('react-dom')).hydrate
 )();
 

packages/integrations/react/src/index.ts

@@ -36,7 +36,7 @@ function getViteConfiguration() {
 			dedupe: ['react', 'react-dom'],
 		},
 		ssr: {
-			external: ['react-dom/server.js'],
+			external: ['react-dom/server.js', 'react-dom/client.js'],
 		},
 	};
 }