Whenever I go to add the concrete material to the columns, blender completely freezes up on me and I end up having to force quit. Not sure if it has to do with my hardware but I'm using a Macbook Pro (2019):
It might be some bug if you're using the latest Blender version. It would be better maybe if you can use the Blender version that is being used in the tutorial and see if it works. Although I remember that material being a bit tough on the hardware. I have a beefy computer and it struggled with that scene. Something about all the noise textures cranked all the way up and the AO, it is a bit computer intensive.
Thanks for the info. I am using version 3.5.1 so I’ll have to do some research to see if I can tweak the material somehow to be less computationally expensive, but I’ll definitely try using the version used in the tutorial too.