Read the Version value. If this value reads as 4.7.x then this is the issue.
Downgrading to a supported version of .NET Framework will be required. Supported versions are 4.5.x and 4.6.x. Refer to page# 14 in IT Management Suite (ITMS) Support Matrix HOWTO9965
To uninstall the upgrade, the respective KB numbers listed above needs to be uninstalled from the Windows Updates on the potential Task Servers. Then verify that the version in the registry lists 4.5.x or 4.6.x, if not download and install one of those version's from Microsoft.
Windows 10 Creators Edition comes with .NET 4.7 natively and cannot be downgraded.
Updates to .NET 4.7 after Task Server is installed are not tested and therefore are not supported at this time.
The following article from Microsoft covers temporarily blocking the upgrade to 4.7