Popup material window doesn't appear

Hi all,

Since Yesterday it is impossible to assign material to my 3D file because the pop-up material window doesn’t appear when I click on the round icon in the layer window. (rhino 6).

I reset the computer, I reset Rhino, I opened a new blank document to try … nothing…

Have you ever encounter this problem ?

Thanks a lot for your help !

Hi - please run the Rhino SystemInfo command and copy-paste the result here.
Are you able to open the Materials panel from the top menu (Render or Panels)?