upgrade_required

HTTP status	426
Area	Realtime
Problem type	https://docs.nexafone.so/errors/upgrade_required

What the detail says

The detail explains the occurrence; it can read, for example:

• Open this endpoint as a WebSocket, version 13.

Example

{
  "type": "https://docs.nexafone.so/errors/upgrade_required",
  "title": "Upgrade Required",
  "status": 426,
  "code": "upgrade_required",
  "detail": "Open this endpoint as a WebSocket, version 13.",
  "requestId": "01J9Z8Q4TQ3W6M5V2X7Y8Z9A0B"
}

Match on code, never on detail: the wording may change. See Problem Details.