When you try to uninstall the MACP component after you run the Stop-CsWindowsService cmdlet in Microsoft Skype for Business Server 2019, the component can’t be uninstalled. Additionally, you receive the following error message:
Fatal error during installation.
To resolve this issue, start SSUI to get the latest fix, and then uninstall the MACP component.
This failed installation issue will recur if you double-click MacpWebcomponent.msp to install MACP together with the latest version after you run Bootstrapper.exe. To work around this issue, you should open the SSUI to get the latest fix, and then uninstall the MACP component.