Grasshopper loading error

Hi, I use Rhino 6 and GH 1 and I am wondering what is this error that I get every time I open GH. Any idea? How to solve it? Could someone please point me to the right direction?



Seems your windows is missing this method:

Maybe you need to update your .net version of there is something wrong with your windows .net install.

This is what the color picker component looks like: