[HELP] Trying to Refresh Material on the Sky Sphere Via Level Blueprint

Okay, as I said in the title. I am using my Level Blueprint to try and refresh the Sky Spheres Material Via the Tick Event. Every Tick my Light Source changes rotation and I want the Sky Sphere to update based on that. However, The material only refreshes if you click the button to do so. How can I make it refresh every tick? Thanks Guys!

(By the way, I searches google a dozen and a half times trying to figure this out and the most I can come up with, is a tutorial on how to make a day night cycle, but it doesn’t show how to refresh material)