SeedVR2 flash_attn issue in ComfyUI via Stability Matrix

My ComfyUI install in Stability Matrix doesn't load SeedVR2 nodes anymore. The missing nodes are: SeedVR2TorchCompileSettings, SeedVR2LoadVAEModel, SeedVR2LoadDiTModel, SedVR2VideoUpscaler. The console says the issue is: Cannot import C:\Users\---\Desktop\Stability Matrix\Packages\ComfyUI\custom_nodes\ComfyUI-SeedVR2_VideoUpscaler module for custom nodes: Failed to import diffusers.loaders.single_file_model because of the following error (look up to see its traceback): 'flash_attn' Any idea how to solve this? Thanks submitted by /u/janeshep [link] [comments.