Why is my Unity Scene gray?Why does my Unity scene look gray?

Hello to whoever is read this. I've been coming back to unity since taking a break but every time I open Unity my scene view is grayed out but when I click on the scene view it goes back to normal for a spit second and then goes back to gray. It's pretty annoying and I have been putting aside for 3 weeks now.

Any help would be greatly appreciated. Thank you for reading.