Press_keycode endpoint not found (404)

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1

I make self.driver.press_keycode(32) request from appium python client to Windows Server 2016 with WinAppDriver. It raises:

selenium.common.exceptions.WebDriverException: Message: Command not recognized: POST: /session/0EE8D504-0E79-418E-AA9F-5D079657AD12/appium/device/press_keycode

WinAppDriver shows:

==========================================
POST /session/0EE8D504-0E79-418E-AA9F-5D079657AD12/appium/device/press_keycode HTTP/1.1
Accept: application/json
Accept-Encoding: identity
Connection: keep-alive
Content-Length: 68
Content-Type: application/json;charset=UTF-8
Host: 116.202.1.50:4723
User-Agent: appium/python 0.46 (selenium/3.141.0 (python linux))

{"keycode": 32, "sessionId": "0EE8D504-0E79-418E-AA9F-5D079657AD12"}
### WinAppDriver::CommandHandler::Appium::HandleCommandAsMidPoint - Command  is not recognized
HTTP/1.1 404 Not Found
Content-Length: 164
Content-Type: application/json

{"status":9,"value":{"error":"unknown command","message":"Command not recognized: POST: /session/0EE8D504-0E79-418E-AA9F-5D079657AD12/appium/device/press_keycode"}}

According to docs endpoint seems to be correct: http://appium.io/docs/en/commands/device/keys/press-keycode/index.html

So how to press Space?

Thanks!