You do not have the Net 4.0 framework installed.
Do this:
Test-Path C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
If it is false then you need to I stall Net 4.0
If you are on a 32 bit system then this will not be installed.
Try this too:
Test-Path C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
This will test for the 32 bit version
Contact Citrix for help installing this code. The issue has nothing to do with PowerShell.
\_(ツ)_/