PaygateDeveloper documentation
422providers.invalid_providerprovidersRule R22

The provider registration is not valid

RegisterProvider was called with a blank code or name, or a kind outside bank, psp, wallet. errors[0].field names the offender.

Why the API refuses

WHEN RegisterProvider is executed with a blank code or name, or a kind that is not bank, psp or wallet, THE SYSTEM SHALL reject it naming the field.

What to do

A platform operation, not a partner one. Fix the named field.