meta_error
Facebook refused the message
Meta declined it with something we have not given a name of its own. Their wording is passed through untouched in the message field, because a refusal we have not met before is more useful verbatim than flattened into "something went wrong".
What to do
Read the message field: it is Meta's own sentence. If it describes something a developer could act on and this page did not help, tell us at hello@upeo.ai and it will get a page of its own.
The shape
{
"error": {
"type": "...",
"code": "meta_error",
"message": "...",
"docs": "https://docs.njiwa.upeo.ai/errors/meta_error"
}
}