Error transferring https://<organization portal URL> - server replied: Not Found (203)

Error Message

When adding a connection URL for ArcGIS Survey123 Connect, the following error message is returned:

Error:   
Error transferring https://<organization portal URL> - server replied: Not Found (203)

Cause

The URL input in the ArcGIS connection URL box is incorrect. For example, after upgrading ArcGIS Enterprise, the name configured for the new Web Adaptor does not match the older version, returning the error above. This issue can also arise when copying and pasting the URL from the Portal for ArcGIS home page into the ArcGIS connection URL box, as the URL contains '/home'. Refer to ArcGIS Survey123: Setup and ArcGIS Enterprise: Installation requirements for more information.

Solution or Workaround

Use the correct URL

Ensure the URL is correctly typed into the ArcGIS connection URL box before clicking Add. Refer to the code block below for the correct URL format.

https://<webadaptorhost>.<domain>.com/<webadaptorname>/