HTTP/1.1 502 Fiddler - Connection Failed
Date: Thu, 09 Jul 2020 10:31:22 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Cache-Control: no-cache, must-revalidate
Timestamp: 18:31:22.409
[Fiddler] The connection to 'xxx' failed.
System.Security.SecurityException Failed to negotiate HTTPS connection with server.fiddler.network.https> HTTPS handshake to xxxxxx (for #21) failed. System.Security.Authentication.AuthenticationException 调用 SSPI 失败，请参见内部异常。 < 接收到的消息异常，或格式不正确。
Win32 (SChannel) Native Error Code: 0x80090326
这个可以通过修改以下配置解决 ：
Tools / Fiddler Options.. / HTTPS / 点击 protocols 链接
修改值为 ：
即可