400 Bad Request with no message being returned where more return info is expected

Exception message issue.
When a request is performed for which an error is returned (example below), some detail is required to inform the user about the status and what the error actually is.

Example:

GET https://apisandbox.openbankproject.com/obp/v3.0.0/banks/rbs/accounts/abcd1234/kapil_view/other_accounts/aki123

Should return a more meaningful message than

400 Bad Request

{
  "error": "error"
}

Suggested response code detail:
403 Forbidden
The request was valid, but the server is refusing action. The user might not have the necessary permissions for a resource, or may need an account of some sort.

Inizia riproducendo la richiesta all’endpoint OBP API indicato e traccia il punto in cui viene prodotta la sua risposta generica 400. Determina come l’errore sottostante debba essere associato a uno stato e a un messaggio significativi, incluso il caso 403 relativo ai permessi suggerito; il lavoro è completato quando la risposta spiega il motivo del fallimento invece di restituire soltanto {"error":"error"}.