Here is one of the packages it required me to add to my VS2017 installation in order to be able to install your plugin.
The other package I needed to install (and can’t seem to find in this list) was a package that seemed to be required to develop extensions for VS2017
I find both of these requirements strange, since no other plugin ever required them. [HR][/HR]
Edit:
Ok, I found the other package. I was speaking of this thing:
I am not sure what has been installed or not noq, I’m confused… If you know what has been installed, I would be happy if you told me because I hate bloating up my VS2017 installation 
[HR][/HR]
Edit 2:
I tried deleting the component mentioned above and tried to reinstall your plugin. I get the same message upon installation as before, see below:
It’s in german, yes, but the important part reads:
Required Components: (Erforderliche Komponenten: )
C# and Visual Basic (C# und Visual Basic)
Required Components for the Visual Studio-Extensionsdevelopment (Erforderliche Komponenten für die Visual Studio-Extensionsentwicklung)