Cause
The document does not compile: details.errors lists up to 50 problems (references, types, jumps, limits or response budget). The preview reports the same ones as ok: false.
What to do
Fix the document and repeat the preview.
application/problem+json
{
"type": "https://masnet.com/developers/errors/invalid_rule",
"title": "Invalid definition",
"status": 422,
"detail": "...",
"code": "invalid_rule",
"correlation_id": "..."
}