Read AGENTS.md and follow it exactly.

Task:
Diagnose this custom node problem and fix only the direct cause.

Requirements:

- Limit changes to the relevant custom node and direct supporting files only.
- Do not change unrelated custom nodes.
- Do not upgrade broad dependency sets unless absolutely necessary.
- Use startup logs as evidence.
- Report exact files changed and exact commands run.

Problem:
[paste startup error or traceback]