Invalid signature - Githubissues

I'm trying to create a payment URL following the examples but the API call always return the following error:

  code: '40002',
  msg: 'Invalid Arguments',
  subCode: 'isv.invalid-signature',
  subMsg: '验签出错，建议检查签名字符串或签名私钥与应用公钥是否匹配，网关生成的验签字符串为：app_id=9021000123609320&amp;biz_content={&quot;out_trade_no&quot;:&quot;商家的交易码，需保持唯一性&quot;,&quot;total_amount&quot;:&quot;0.1&quot;,&quot;subject&quot;:&quot;测试订单&quot;}&amp;charset=utf-8&amp;method=alipay.trade.pay&amp;notify_url=http://www.notify.com/notify&amp;sign_type=RSA2&amp;timestamp=2023-08-03 17:42:46&amp;version=1.0'

The request:

  const result = await alipaySdk.exec('alipay.trade.pay', {
      notify_url: 'http://www.notify.com/notify', 
      bizContent: {
        out_trade_no: '商家的交易码，需保持唯一性',
        total_amount: '0.1',
        subject: '测试订单',
      }
    });

What I'm missing?

alipay / alipay-sdk-nodejs-all

Invalid signature #109