SUBSCRIPTION_REQUIRED
Billing Emitted by the current API
Meaning
Your free slots are used up: a subscription is required to create another application.
What to do
Check your plan and quotas in the developer space.
Keep the request_id field of the response: it lets support find the incident.
Example response
{
"code": "SUBSCRIPTION_REQUIRED",
"message": "Your free slots are used up: a subscription is required to create another application.",
"docs_url": "/errors/SUBSCRIPTION_REQUIRED",
"request_id": "01a0d2…"
}