The knowledge file upload does not recognize Excel files

I’m in the process of creating my own GPT and testing the ability to upload and retrieve data from various MS Office files.

While other files (Word, PDF, PPT) are recognized well, only the xlsx files are not. It is showing an error message saying “cannot open the file” exclusively for Excel files.

Is there anyone else experiencing the same problem, and is there a solution to this issue?

  • Note: I’m not uploading files in the prompt; I’ve pre-uploaded the files in the Knowledge settings.

I have the same problem here. It was okay about 24 hours ago but will not work what so ever as of now.

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Same. I tested it a few days ago and there were no issues, but suddenly it doesn’t work.