Report Server WMI Provider Error: Invalid namespace when connecting to Report Server Instance on Reporting Services Config Manager

I have two SQL Server 2016 instances (Instance A and Instance B) on the same server. Both instances have SSRS. At one point I upgraded Instance A to SQL Server 2019 but then due to the changes made to SSRS in 2019 I decided to bring Instance A back to 2016. I can connect to Instance A just fine on SQL Server 2016 Reporting Services Configuration Manager but now every time I try to connect to Instance B I receive this error: Report Server WMI Provider error: Invalid namespace. I've done some research and can't find a situation exactly like this. Does anyone know of a fix for this or have an idea of where I could find some more information on the problem? Before I try uninstalling and reinstalling SSRS on Instance B I wanted to see if I could find a fix that didn't require uninstalling and reinstalling.