Odk failing to upload results to google drive

My ODK Collect is failing to upload results to google drive. it's saying ' is this an open rosa submission endpoint? if you are using a web proxy you need to login with your network'. below these statements it says HEAD requests result status code : 200.
am using Android version 8.1.0 and ODK Collect version 1.29.3. am failing to proceed as am a fairly basic user of ODK. I have attached my screenshot. kindly help

Have you seen this video tutorial: https://www.youtube.com/watch?v=GnXwGmhaI9U

And have you looked at the documentation on connecting Collect to Google.

Did you add a submission_url to the settings tab of your XLSForm? It sounds like you may have the wrong URL.