Your profile indicates you are using SketchUp 2016 so you should see this:
Since this is a recent change in behavior and since there’ve been no changes to SketchUp 2016 since 2016, you need to look at what has changed. Most likely graphics driver updates pushed by Microsoft. Windows updates frequently contain graphics driver updates that don’t adequately support OpenGL. We see frequent reports of this here on the forum. Sometimes those updates also change the default graphics from the Nvidia card to the integrated Intel graphics adapter and cause issues. Check to see that SketchUp is actually using the Nvidia card and make sure its drivers are up to date directly from Nvidia.