demo 出现以下错误

[hopher]

ant design pro 接入demo时，报以下错误

Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.

import React, { useEffect, useState } from 'react';
import { TUIKit } from '@tencentcloud/chat-uikit-react';
import '@tencentcloud/chat-uikit-react/dist/cjs/index.css';
import TIM, { ChatSDK } from 'tim-js-sdk/tim-js-friendship';
import TIMUploadPlugin from 'tim-upload-plugin';


const init = async () => {
   return new Promise((resolve, reject) => {
      const tim = TIM.create({ SDKAppID: 0 });
      tim?.registerPlugin({ 'tim-upload-plugin': TIMUploadPlugin });
      const onReady = () => { resolve(tim); };
      tim.on(TIM.EVENT.SDK_READY, onReady);
      tim.login({
         userID: 'xxx',
         userSig: 'xxx',
      });
   });
}

export function SampleChat() {
   const [tim, setTim] = useState<ChatSDK>();
   useEffect(() => {
      (async ()=>{
         const tim = await init()
         setTim(tim)
      })()
   }, [])

   return (
           <div style={{height: '100vh',width: '100vw'}}>
              <TUIKit tim={tim}></TUIKit>
           </div>
   );
}