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Log keyword: ModuleNotFoundError
A successful installation in a terminal does not show that ComfyUI uses the same Python. Separate the import name, distribution name and running interpreter before changing dependencies.
Log keyword: ResolutionImpossible
Dependency resolution failures mean pip could not satisfy the requested constraints. Separate a real conflict from slow backtracking, timeouts and certificate failures before retrying.
Log keyword: _ARRAY_API not found
These messages usually concern the interface between NumPy and a compiled extension, not a broken workflow connection. Locate the first implicated extension before changing NumPy.
Log keyword: Missing Node Types
Use this guide when an imported workflow contains unresolved nodes or the backend cannot find a node type. Save a workflow copy and its original source first. An unresolved node does not prove that all of its files are missing from the computer.
Log keyword: ImportError: cannot import name
The module may exist while an expected class or function no longer does. A partial update, API change or local name collision can look like a missing package but needs a different response.