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n8n - 💡(How to fix) Fix Qwen‑3.5‑122B problems

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Bug Description

Deploy the Qwen‑3.5‑122B model via vLLM with OpenAI‑compatible API loading. Chatting works normally in the chat interface, but behaves abnormally in workflows: all query responses return {"output": ""}.

To Reproduce

Deploy the Qwen‑3.5‑122B model via vLLM with OpenAI‑compatible API loading. Chatting works normally in the chat interface, but behaves abnormally in workflows: all query responses return {"output": ""}.

Expected behavior

Deploy the Qwen‑3.5‑122B model via vLLM with OpenAI‑compatible API loading. Chatting works normally in the chat interface, but behaves abnormally in workflows: all query responses return {"output": ""}.

Debug Info

Deploy the Qwen‑3.5‑122B model via vLLM with OpenAI‑compatible API loading. Chatting works normally in the chat interface, but behaves abnormally in workflows: all query responses return {"output": ""}.

Operating System

linux

n8n Version

2.21

Node.js Version

24.0

Database

SQLite (default)

Execution mode

main (default)

Hosting

self hosted

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FAQ

Expected behavior

Deploy the Qwen‑3.5‑122B model via vLLM with OpenAI‑compatible API loading. Chatting works normally in the chat interface, but behaves abnormally in workflows: all query responses return {"output": ""}.

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n8n - 💡(How to fix) Fix Qwen‑3.5‑122B problems