In our app we are explicitly passing it: httpClient = new HttpClient (new Xamarin.Android.Net.AndroidClientHandler ()); ...

Selenium 4.17.0 Appium CLI v2.4.1 MacOS Ventura 13.5.2 Android API 34 Pixel 7 Emulator Details Please provide more details, if necessary. Attempting to run the test always fails at driver = ...

You need to change the way you use HttpClient to keep your application from failing. And, if you're using ASP.NET Core, there's a tool that makes it considerably easier to do the right thing ...