Error [TypeError]: Converting circular structure to JSON

[Mico]

import Moralis from “moralis”;

export default async function handler(req: any, res: any) {
if (req.method !== ‘POST’) {
return res.status(405).send({message: ‘Only POST request are allowed’});
}
if (!Moralis.Core.isStarted) {
await Moralis.start({apiKey: process.env.MORALIS_API_KEY})
}
const address = “0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d”;
const chain = 97;

try {
const response = await Moralis.EvmApi.token.getWalletTokenBalances({
address,
chain,
});
return res.status(200).json({
data: tokens,
});
} catch (e) {
return res.status(500).send({message: e});
}
}

this is my error, people tell me what’s wrong.

• error Error [TypeError]: Converting circular structure to JSON
  –> starting at object with constructor ‘ClientRequest’
  | property ‘socket’ -> object with constructor ‘TLSSocket’
  — property ‘_httpMessage’ closes the circle
  at JSON.stringify ()
  at sendData (E:\projects\revoke\node_modules\next\dist\server\api-utils\node.js:201:47)
  at ServerResponse.apiRes.send (E:\projects\revoke\node_modules\next\dist\server\api-utils\node.js:444:31)
  at handler (webpack-internal:///(api)/./src/pages/api/moralis/token-wallet.ts:59:32)
  at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  digest: undefined
  }

[johnversus]

@Mico

const address = “0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d”;

It seems like there is no token balance for this wallet on testnet. So it returns an empty response.

@Mico

return res.status(200).json({
data: tokens,
});

Probably the JSON error occured since the code is trying to convert the empty response to json.?