WalletConnect V2原生JavaScript环境下personalSign扫码签名异常问题

我正在自己的站点上基于HTML和原生JavaScript（vanilla JavaScript）完成从WC1到WC2的迁移，尝试多种方案后效果均不理想。当前实现的方案在MetaMask浏览器插件环境下运行正常，但扫码连接钱包时出现问题：地址连接完成后发送personalSign请求，扫码场景下会触发错误（错误截图：）。

以下是我的JavaScript代码：

import {
  EthereumClient,
  w3mConnectors,
  w3mProvider,
  WagmiCore,
  WagmiCoreChains,
  WagmiCoreConnectors
} from "https://unpkg.com/@web3modal/ethereum@2.7.0";

import { Web3Modal } from "https://unpkg.com/@web3modal/html@2.6.2";

// 0. Import wagmi dependencies
const { mainnet, polygon, avalanche, arbitrum } = WagmiCoreChains;
const { configureChains, createConfig, watchAccount, signMessage, disconnect  } = WagmiCore;

const projectId = "PRIVATE_ID";
const chains = [mainnet, polygon, avalanche, arbitrum];
// 2. Configure wagmi client
const { publicClient } = configureChains(chains, [w3mProvider({ projectId })]);
const wagmiConfig = createConfig({
  autoConnect: true,
  connectors: [
      ...w3mConnectors({ chains, version: 2, projectId })
   ],
  publicClient
});

// 3. Create Ethereum and modal clients
const ethereumClient = new EthereumClient(wagmiConfig, chains);
export const web3Modal = new Web3Modal(
  {
    projectId

  },
  ethereumClient
);
const unwatch = watchAccount((account) => checkaccount(account));

document.getElementById('my-button').addEventListener('click', () => {
  web3Modal.openModal()
})

async function checkaccount(account)
{
  try {
    if (account.address) {
      const signature = await signMessage({
      message: 'prova 123',
    });
    console.log(signature);
        await disconnect();

    }
  }
  catch (err) {
      console.log(err);
  }
}

另外，尝试将依赖包从https://unpkg.com/@web3modal/html@2.6.2升级到https://unpkg.com/@web3modal/html@2.7.0时，出现process.env未定义的错误，恳请帮忙排查解决。

内容的提问来源于stack exchange，提问作者Enrico Luperini