CVScope "Invalid URI: The hostname could not be parsed."

What does this error mean in the context of Computer Vision when attempting to Indicate on screen the CVScope?

We have an on-prem CV server and I have set the Server value in the Computer Vision section of the Project Settings and left blank the Server URL in the CVScope activity.

Studio 2021.10.4
UiPath.UIAutomation.Activities 21.12.0-preview

Is the server value enclosed in double quotes in the project settings section? This might cause the issue, as the value is supposed to be unquoted in that section.