ComfyUI Guides
Fix ComfyUI startup failures, missing packages, plugin errors, and dependency conflicts.
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Wonderful Launcher Quick Start
Select a ComfyUI runtime package, launch it from Home, follow startup logs, and open the embedded Workspace.
ComfyUI Startup Failed? How to Diagnose and Recover Faster
Fix ComfyUI startup failures caused by broken plugins, dependency drift, missing packages, and fragile environments.
ComfyUI Plugin Import Failed: Fix Custom Node Errors
Fix ComfyUI plugin import failed errors, broken custom node imports, red workflow nodes, and dependency drift without reinstalling your environment.
ComfyUI Dependency Conflicts: Fix Without Reinstalling
Fix ComfyUI dependency conflicts after custom node installs, Torch downgrades, pip clashes, broken plugin imports, or package pins like sensevoice-onnx and setuptools.
Fix No module named errors in ComfyUI
Diagnose ComfyUI ModuleNotFoundError and No module named errors by package name, Python environment, custom node dependency, and CUDA or PyTorch mismatch.
Where to Put Safetensors in ComfyUI Models Folder
Find the right ComfyUI models folder for safetensors files: checkpoints, LoRA, VAE, ControlNet, Flux diffusion models, text encoders, and upscalers.
ComfyUI Broken? Troubleshooting Decision Tree
Systematic diagnosis for broken ComfyUI — identify whether the problem is a startup crash, plugin conflict, dependency error, or model issue.
Browse by Category
Getting Started
New to ComfyUI? Start here:
Troubleshooting
Fix common problems:
ComfyUI Common Issues and Fast Fixes
Fast fixes for common ComfyUI problems: startup failed, CUDA errors, red nodes, missing models, prompt has no outputs, reconnecting, and slow generation.
ComfyUI Reconnecting Error: Fix the Stuck UI
Fix ComfyUI stuck on Reconnecting by checking backend crashes, 127.0.0.1, custom nodes, VPN/proxy/firewall blocks, websocket drops, and GPU crashes.
Missing Packages
Fix Python import errors:
No module named 'torch' in ComfyUI
Fix ModuleNotFoundError: No module named 'torch' in ComfyUI portable, venv, and managed installs, then verify the repaired Torch build still has CUDA.
Fix No module named errors in ComfyUI
Diagnose ComfyUI ModuleNotFoundError and No module named errors by package name, Python environment, custom node dependency, and CUDA or PyTorch mismatch.
ModuleNotFoundError: No module named 'cv2' in ComfyUI
Fix ModuleNotFoundError: No module named 'cv2' in ComfyUI, missing opencv-python-headless, opencv-contrib-python, and OpenCV package conflicts.
No module named 'insightface' in ComfyUI: Windows Fix
Fix No module named 'insightface' in ComfyUI for ReActor, IPAdapter FaceID, InstantID, PuLID, and other face-swap or face-analysis nodes on Windows.
Models & Workflows
Work with AI models:
Need Help?
Start free with Wonderful Launcher if this affects your real ComfyUI environment. It keeps launcher-native repair, task logs, and runtime checks in one place; credits are only for image generation and metered tools.