n8n - 💡(How to fix) Fix Header Bug

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Fix / Workaround

Please update or patch my cloud instance, or advise the supported workaround.

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My n8n Cloud OpenAI credential test is failing with:

config.headers.setContentType is not a function

Credential: OpenAI account Base URL: https://api.openai.com/v1 Organization ID: blank Custom headers: disabled API key: newly created

This appears to match the known n8n 2.19.x OpenAI/api.openai.com header bug: https://github.com/n8n-io/n8n/issues/29471

Please update or patch my cloud instance, or advise the supported workaround.

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