C＃Flurl和HttpClient，REST API没有响应

I am having a problem with getting a response from an API with my code, the request does not time out and it does not give me a response at all. I have made an api endpoint in my own API to return the json string to then manually post the json data with "Firefox Poster" and it works just fine. With this I believe that the problem is somewhere in my code.I am having a problem with getting a response f