ControlNetLoader ‘NoneType’ object has no attribute ‘keys’

Hi all

Total newbie here. I am an architect trying to utilize Stable Diffusion 3.5 + ComfyUI in my daily work. I'm especially interested in generating an image from a source image using controlnets. However, when I am trying to use the controlnets I am getting an error saying that "ControlNetLoader 'NoneType' object has no attribute 'keys'" and I absolutely can not understand what I am doing wrong here or how to fix it.

I copied my workflow from this blogpost: https://blog.comfy.org/p/sd3-5-large-controlnethttps://blog.comfy.org/p/sd3-5-large-controlnethttps://blog.comfy.org/p/sd3-5-large-controlnet

Could anyone help me figure out what do I need to do to get this working? Thanks in advance!