Uncaught ReferenceError: React is not defined

Uncaught ReferenceError: React is not defined
    default StartClient.tsx:81
    c dev.js:555
    untrack dev.js:444
    c dev.js:551
    runComputation dev.js:708
    updateComputation dev.js:690
    devComponent dev.js:562
    createComponent dev.js:1278
    <anonymous> entry-client.tsx:3
    render dev.js:117
    updateFn dev.js:181
    runUpdates dev.js:815
    createRoot dev.js:186
    render dev.js:115
    hydrate$1 dev.js:274
    hydrate dev.js:578
    mount mount.tsx:108
    <anonymous> entry-client.tsx:3

import { defineConfig } from "vite";
import solid from "solid-start/vite";
import vercel from "solid-start-vercel";

export default defineConfig({
  plugins: [ solid({ adapter: vercel() }) ],
  build: {
    target: 'esnext',
  },
});