NerdyRodent/NR-Flux-ComfyUI-Workflows · None of the workflows load

I tried downloading these workflows and nothing at all happens when I tell ComfyUI to open them. I tried a completely new download of ComfyUI (Windows portable version) with only the Manager installed, in case some of my nodes were old (I knew I had some conflicting nodes in the list, as well). The completely new ComfyUI install also does absolutely nothing when I try to load these .json workflows. A workflow I made myself (which is in .png format) does load, but these .jsons do nothing, not even a message in the Terminal that Comfy's running in. I have no idea why.