Fix a workflow that will not run

When you load a template or a workflow shared by someone else, ComfyUI may need files, nodes, inputs, or account access that are not included in the workflow. Start with the first warning you see.

What you see	What it usually means	Next step
Missing model or an empty model selector	A local model file is unavailable or in the wrong folder	Open the model details, download the requested file, place it in the indicated folder, then refresh or restart ComfyUI. See model files.
Missing node	The workflow uses a node your installation does not have	Try a built-in template, or install the required custom node. Update ComfyUI if the missing node is part of a newer core release.
Missing image, video, audio, or other input	The workflow expects a file or prompt you have not provided	Find the input node or panel, provide the requested file or text, then run again.
Sign-in, network, or credit error	A Partner Node or Comfy Cloud node is calling a hosted service	Check your connection, sign in to your Comfy account, and check your credits. See where workflows run.

Check the workflow before installing anything

A workflow file stores its steps and settings. It does not bundle every model, custom node, or input file used by its creator. Look at the missing-item warning and identify which category it belongs to. You do not need to install custom nodes to fix a missing model, and downloading a model will not fix an account or credit error. If a built-in template still fails after you satisfy its listed requirements, check Workflow Templates for model folder details or visit the troubleshooting guide.

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Fix a workflow that will not run

Check the workflow before installing anything

​Check the workflow before installing anything

Check the workflow before installing anything