Trouble with Riffmaster

I bought the Riffmaster when it came out, and it worked on my pc fine on games like Fortnite Festival and also Clone hero. I haven't used it in a while, though. Recently, I decided I wanted to play it again, and plugged in the dongle and connected the guitar to my pc. All of a sudden, it doesnt want to work at all. Does anyone know why or how to fix this?