Payload error on generateInvoiceNumber

[BoiteBeet]

Get this error now when doing the generateInvoiceNumber. Was working great until today. Seems like paypal changed something with the type verification or empty payload.

{
  debug_id: "***",
  details: [],
  links: [],
  message: "The request payload is not supported",
  name: "UNSUPPORTED_MEDIA_TYPE"
}