No route found. Setting content type to 'text/plain'

Hello,

i’m new to Appium for UI testing and i’m trying to setup a simple test looking at the C# examples on https://github.com/Microsoft/WinAppDriver

I downloaded both WinAppDriver and Appium client and tried to run the CalculatorTest with both.
When i start the WinAppDriver server the test runs fine, but if i start the server via Appium i get this error:

  • No route found. Setting content type to ‘text/plain’ *

I start the server with the default settings.

This is the log i see in the Appium window:

[Appium] Welcome to Appium v1.12.1
[Appium] Non-default server args:
[Appium] address: 127.0.0.1
[Appium] Appium REST http interface listener started on 127.0.0.1:4723
[HTTP] --> POST /session
[HTTP] {"desiredCapabilities":{"app":"Microsoft.WindowsCalculator_8wekyb3d8bbwe!App","deviceName":"WindowsPC","platformName":"Windows"}}
[HTTP] No route found. Setting content type to 'text/plain'
[HTTP] <-- POST /session 404 9 ms - 50

Does anyone knows what is the difference between the server that WinAppDriver starts and the one the Appium client starts?
Thanks

@Carmine_Giordano, did you solve this issue?
I do have exactly the same error, trying the Appium calculator python sample