"Unknown Error Ocurred" when uploading a 40 mb JSON file as knowledge to Custom GPT

Hello.

I’m trying to upload a 40 mb web scraping data as knowledge to my Custom GPT in JSON format and I’m getting an “Unknown Error Ocurred” error. This also happens with XML file. TXT, CSV and Excel uploaded without error. I checked in this page a similiar error fixed 1 day ago. Maybe it is still happening? Is there anyone experiencing the same error?

Thanks!