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ChatGPT saying Unknown Error Occurred for File Uploads

OpenAI Developer Community March 7, 2026
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Curious to understand the scope here. A couple quick questions that would help narrow it down: - Does this only happen when uploading code files, or do you see the same behavior with other file types as well? - Are you seeing this inside ChatGPT, or inside a Custom GPT? If you’re able to reproduce it consistently, the fastest way for us to investigate is through a support ticket, please send the following to support@openai.com: - A HAR file from the session where the upload fails - The conversation ID - The timestamp when the error occurred - The exact error message, if one appears That should give the team enough detail to trace what’s happening on the backend. -Will

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