API：APP下单API“https://api.mch.weixin.qq.com/v3/pay/transactions/app” 完整的请求： Authorization: WECHATPAY2-SHA256-RSA2048 mchid="1638890864",nonce_str="zySEXB9TDbkYnWCr9SVkeDUO2NqBKQGe",timestamp="1678088201",serial_no="200BB8B8BB2F28D8B444365A3ECE3B651C5B771D",signature="eTngU9SVwLWtH+vmshsQtzStPnSgLvRlkrYZPfnhVjRJVhjM+5bPxuEnBbBQOHBnDdP29L9Y25xERf+lY9kSwAtoEqS847JNYqh3r4XHllSJ93rWxVTuX5TS1xpCgJVga+i52HDnCsNU+EOOzelBbiBp1C5jh0k4kns1sqtiATlh4D3/BQm/IMVHEMvHXLsiUqCVtVrM+fVS6KMhteuEQCzfz/tE4DidcynrTUO0I0wpD9hh/DxkTXDd8YPVC749kgZNOEO+tlYuqoBEULPb/g9ztE1GxsaYouPS2oBRChrnXfPOeTxtJfHHAwBNg3QD9OeEvd3SZrBr68xq1x4T5w==" {"out_trade_no":"20230302095935497839","description":"卫生间防水","amount":{"total":1},"notify_url":"https:\/\/zhongbaozs\/payment\/wechatPay","appid":"wxc31faeb053e984d2","mchid":"1638890864"} 返回： {"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":289,"truncated_sign_message":"POST\n/v3/pay/transactions/app\n1678023077\nIDxpDGJbfG2AvC7u6lJ22RZehBg5Ctu5\n{\"out_tr\n","url":"/v3/pay/transactions/app"}},"message":"商户证书序列号有误。"} 用的是V3密钥，重置过密钥和证书依旧没解决问题。希望能大神给予解答

之前正常的公众号网页，服务器更换了IP，公众号内的IP白名单修改了。但支付的回调无法收到，请问是什么原因

[图片] [图片] 微信公众号原始ID是：gh_ded919d61639

小程序ID： wx123ab2a94e37755f 小程序名称：后台供应商

1.平台只做招商项目展示，不提供融资担保服务。 2.平台没有在线融资，只是做为活动报名，通过支付防止恶意报名。 需要怎么修改才能避免以上错误提示，每次审核提示不同，不知道怎么修改

移动应用和微信小程序都接入了微信开放平台，应用是用Uni-app打包的。 [图片] [图片] [图片]