forge_upstream_unconfigured
What happened
Uploads go through a separate storage and processing service. When the address or the key for it is missing on Forge's side, the request is refused with 503 before anything is sent. This is a platform fault, not a problem with your file.
What to do
Nothing on your side changes it. Check the status page, try again later, and contact support if it lasts.
Example
json
{
"error": {
"code": "forge_upstream_unconfigured",
"message": "Uploads are not available right now.",
"detail": {}
}
}