Cause
starts_at and ends_at do not form a valid window: the end must be after the start and the window lasts at most 90 days, 30 if the severity is critical.
What to do
Fix the validity dates.
application/problem+json
{
"type": "https://masnet.com/developers/errors/invalid_window",
"title": "Invalid window",
"status": 422,
"detail": "...",
"code": "invalid_window",
"correlation_id": "..."
}