It’s totally stuck, I believe it’s just dirty. I am comfortable taking things apart and putting them back together but I can’t figure out how to start on this camera to get in there to clean it.
The way I got in there was through the lens at the front of the camera. There are three tiny screws there. Once you open them up, you can get through the layers to the shutter and, if I remember correctly, the rest of the inner camera workings.