shape key stops Blender working!

Hello, I have been creating my own characters for a quite some time, and I recently have noticed the problem with my character. While all others, or one that created previously, seemed to render fine in cycles, but last one I created just won’t let me render anything! I just found out that it was the shape keys. Whenever I disable all the shale keys, it let me render. But if I turn on any of them, Blender just stops responding. Does anyone know about this issue?