I keep getting unsupported file application/csv

I am trying to upload a CSV into assistant playground, and I constantly get a unsupported file format error. Is anyone else facing the same issue

Failed to index file: Unsupported file file-menxrbK6HMDcXkW4gYUkL1LW type: application/csv

Anecdotally, I’ve noticed this with small files.

I am actually having the same issue. And I actually have a small file. The file should grow a little but it will never take so much. Any hints on this topic ?
The JSON version works but apparently it is more efficient to use csv…