Can't run signature update script

Hello all,

I'm fairly new to Powershell so excuse me if I'm not providing you with enough information.

I managed to recover a script that should update my signature in Outlook but when I run it I get this error:

Enable-WindowsOptionalFeature : Feature name RSATClient-Roles-AD-Powershell is unknown.
At C:\Users\dakota.vreys\Desktop\Signatures\test feest handtekening.ps1:129 char:9
+ Enable-WindowsOptionalFeature -Online -FeatureName RSATClient ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Enable-WindowsOptionalFeature], COMException
+ FullyQualifiedErrorId : Microsoft.Dism.Commands.EnableWindowsOptionalFeatureCommand

I googled this and noticed that I had to install the Active Directory module for Powershell, which I did. I gave the computer a reboot but the error keeps showing up. I'm running a Windows 10 Pro version.

Any ideas? Help is appreciated!

Thanks in advance!