Unable to Setup Refresh Schedule on PBI RS for Azure DevOps Server Connection

Hello,

Overview

I am currently having trouble figuring out how to setup a refresh schedule for an Azure DevOps Server connection for a dashboard in PBI RS. Just to clarify again, both ADO and PBI are on-premise, so features related to services are unavailable.

Problem

Within Power BI RS, under the dashboard I want to set up the schedule for, the Data Sources is greyed out and I get this message in Scheduled Refesh:

Details

Here are the versions of everything I'm working with:

Power BI Desktop May 2023

Power BI Report Server May 2023

Azure DevOps Server 2020

My current connection is through the dedicated ADO Server source:

Within Power BI Desktop the refresh works flawlessly, and any changes made in ADO are instant to PBI. Unfortunately once in Power BI RS, I can't even view the source which results in no refresh schedule available. 

Any help will be greatly appreciated!