does anyone know why I might be getting this great grey grid instead of my desktop environment when I remote connect to a vnc server running on ubuntu

I’m Ruby。 I’m roughly 20 apples tall
ルビーです。背がりんごを20つぐらいです。
I drew my profile pic and banner. The gameplay in the banner is from dragon quest 1 for game boy that I recorded myself.
does anyone know why I might be getting this great grey grid instead of my desktop environment when I remote connect to a vnc server running on ubuntu