The "safetensors" files provided for UltraPixel (ultrapixel_t2i.safetensors, lora_cat.safetensors) were not actually safetensors files at all. They were pytorch saves - potentially dangerous binaries - that misleadingly were named with the ".safetensors" extension. I converted both of them to legitimate safetensors files.
Here is a link to my PR for the GitHub repo for a ComfyUI node - it implements the ability to load these safetensor versions, in place of the pytorch saves:
https://github.com/2kpr/ComfyUI-UltraPixel/pull/27
