I am experiencing a persistent bug with the OpenAI “Message a model” node on n8n Cloud version 1.102.3. Regardless of the configuration, the node fails immediately with the error: TypeError: Cannot read properties of undefined (reading 'error').
Troubleshooting Steps Already Performed:
Confirmed Operation: Message a Model is set correctly.
Deleted the node and created a fresh one.
The error occurs even with a simple, static prompt (e.g., the word “Test”).
Configured the prompt using the recommended separate System and User message roles.
The error is identical in all scenarios.
This appears to be a platform bug, as the node fails before any API call is made. Please advise.
Had the same issue, updated to 1.104.0 but now it keeps giving “The service is receiving too many requests from you” it is infact not receving too many requests and I am using open ai Plus account so what is the problem?
It’s a bit confusing, but ChatGPT Plus and the OpenAI API are completely separate.
ChatGPT Plus ($20/month) only applies when you use ChatGPT in the browser or mobile app.
The OpenAI API (which n8n’s Message a Model uses) is billed separately on a pay‑as‑you‑go basis. ChatGPT Plus does not give you API credits.
If your OpenAI API account shows $0 remaining and you haven’t added a payment method, you’re still on the free trial (or it has expired). When that happens, you’ll get the insufficient_quota / “too many requests” error even if you’re barely using it.