UI fails to load (infinite spinner) with ComfyUI v0.4.0 / Frontend v1.35.x

[gregtee2]

Environment

• ComfyUI version: 0.4.0
• Frontend version: 1.35.2
• OS: Windows 11
• GPU: NVIDIA RTX 6000

Problem

After installing comfyui-mixlab-nodes, the ComfyUI web interface fails to load - shows infinite loading spinner on black screen.

Console errors

• WARNING: Multiple instances of Three.js being imported (from model-viewer.min.js)
• Various deprecation warnings about legacy API imports

Steps to reproduce

1. Fresh ComfyUI 0.4.0 install with only ComfyUI-Manager
2. Install comfyui-mixlab-nodes v0.46.0 via Manager
3. Restart ComfyUI
4. Browser shows infinite loading spinner, UI never appears

Workaround

Removing/disabling comfyui-mixlab-nodes allows ComfyUI to load normally.

Likely cause

The bundled Three.js in /webApp/lib/model-viewer.min.js appears to conflict with the new ComfyUI frontend's Vue/Pinia architecture.