A model file is missing
A loader node shows red or the Run stops with a missing file. Here is where each model goes.
Find the model and its folder
ComfyUI names the missing file and marks its loader node in red. Pixaroma workflows have a Download Models button: every model with a download button and the folder it goes in. Other workflows, like ComfyUI's templates, list the models in a note.
Put the file in that folder inside models
Easy-Install:
ComfyUI-Easy-Install/ComfyUI/models. Portable:ComfyUI_windows_portable/ComfyUI/models.checkpointsAll-in-one model filesdiffusion_modelsThe main image or video modeltext_encodersWhat reads your promptvaeTurns the result into pixelslorasSmall add-ons for a style or a characterupscale_modelsMake a picture biggerReload the lists
Click the empty canvas and press R, or restart ComfyUI. If the loader node already shows the file's name, just press Run. If not, pick the file in the loader node's box.
The file is there but not in the list? Check it is in the right folder (not a folder inside it you did not mean) and that the download finished: a broken download is much smaller than the size on the download page.