Upgrading to Storefront 3.12 CU4 fails - MSI logs shows Citrix Protocol Transition service exception

When attempting to upgrade Storefront 3.12 LTSR to CU4 fails. In the Install wizard the following message is displayed: When checking the MSI Installer logs the following exception is found NOTE: MSI logs are found in C:\Windows\Temp\Storefront\CitrixMsi-CitrixStoreFront-x64-201X.-xx-xx-xx.log...