Spits out dark slide but takes no photos

Hi there,

If I insert a film pack (brand new, multiple different packs) and close the film door, the camera mechanism engages and spits out the darkslide. However, when I then try to take a picture, there is a muted click and nothing happens. From what I can see on the outside the shutter is not fully opening, so I think it may have become stuck in some way, which is in turn causing the main camera mechanism to fail.

Any ideas?