I'm getting a 403 on the Colab (while successfully logging in and providing a huggingface token). Is it already disabled? Do you have to pay huggingface to download the model? It's unclear from the Colab and post where the issue is.
The full error I also got was:
HTTPError: 403 Client Error: Forbidden for url: https://huggingface.co/api/models/CompVis/stable-diffusion-v1-4/revision/fp16
I visited https://huggingface.co/api/models/CompVis/stable-diffusion-v... and saw {"error":"Access to model CompVis/stable-diffusion-v1-4 is restricted and you are not in the authorized list. Visit https://huggingface.co/CompVis/stable-diffusion-v1-4 to ask for access."}
Eventually I focused and realized I need to visit that URL to solve the issue. Hope this helps.