I’m stuck on the part where I have to look for something sharp to cut the ropes bounding janet�..

I’m stuck on the part where I have to look for something sharp to cut the ropes bounding janet’s wrists. I already complete the search but, for whatever reason, it’s still asking me to find something sharp. I can’t click on the search area (it’s not sparkling) and can’t move on. I’ve already updated the game and deleted/redownloaded, but nothing will work. What can I do?