I followed the conda instruction which uses Python 3.9 and ran into the same issue. The workaround is to import TypeAlias from typing_extensions: stable-diffus

I followed the conda instruction which uses Python 3.9 and ran into the same issue. The workaround is to import TypeAlias from typing_extensions: stable-diffusion/src/k-diffusion/k_diffusion/sampling.py (before) from typing import Optional, Callable, TypeAlias (after) from typing import Optional, Callable from typing_extensions import TypeAlias This issue is tracked in https://github.com/lstein/stable-diffusion/issues/302 https://github.com/lstein/stable-diffusion/issues/302