A sound problem – Stop Motion Studio Review

So I have been using stop motion studio for a really long time. And it was perfect. But recently, When I record things I can’t hear it. And it is weird that I can’t hear it even though my volume is on 100. But when I upload it to YouTube, I can hear the sound. I don’t know why it is doing this ,but please fix it soon.
Review by Builder Brothers Productions on Stop Motion Studio.