Pixelated and Red Lines

I recently started the free trial for harmony, and for some reason all the lines I make become completely pixelated and red, making it really difficult to do much. I want to try to fix this before my free trial runs out soon. I’m using a Surface Pro 4. I tried resetting default preferences, and restarting the app, but it didn’t help. Let me know if you know the problem I’m having and know how to fix it.