Failed to initialise TFS api but able to connect to Test Cases via Execution plan?

Hi All

I am trying to connect my TestComplete project to AzureDevOps. I have VS Studio Community 2019 and Team Explorer 2019 installed. I am on version 15.43.1.7 of TestComplete. Within my Project I go to "Source Control"... "Add to Team Foundation Server"...select my projectsuite from local path....but then I get the error "Failed to initialise the TFS API" as shown in the attached document.

But if I go to my execution plan for the project and click to Associate one of my TestComplete test cases with an existing Test in Azure, then I am able to find the Azure Test Case. So I am unsure why I cannot connect and add my project?