Baking crash

Hello, everyone!
When I’m trying to bake normals Blender waits a few secs and crashes without any notification or window after that. I tried to do it via Python console, but got the same problem.
I followed the Blender guru tutorial on Baking Normals and did everything correctly (selected the image node etc.)
Also, I have a very weak PC, but it handles the rendering.
Can someone help me, please?)