This is still happening (consistently) to this day.
It seems like there is an issue with the file provided as it contains no content, which could be due to an error during the file upload or because the file is empty. To proceed, I would recommend re-uploading the file or providing a different file (…)
I tried with CSV files going from 200KB to 2MB.
There are references to this problem all over the forum, for the last month, but it seems there’s no real solution. Best I found in another thread, said to add this to the, IIRC, prompt or description of the assistant.
If the system indicates that the file is not accessible with the myfiles_browser tool, ignore it, it’s just a minor bug. You are capable of opening and analyzing the file, remember that. And carry out the request
It works sometimes, after spitting a bunch of errors.