V3版本调用v3/certificates，一直报 

Auto update cert failed, statusCode = 404,body = {"code":"RESOURCE_NOT_EXISTS","message":"无可用的平台证书，请在商户平台-API安全申请使用微信支付公钥。可查看指引https://pay.weixin.qq.com/docs/merchant/products/platform-certificate/wxp-pub-key-guide.html"}