| POST | 400 | MALFORMED_PAYLOAD | Invalid JSON | Incorrect JSON formatted body. |
| 404 | SETUP_NOT_FOUND | The given setup was not found. | Incorrect setup ID passing in URI. |
| 400 | INVALID_REDIRECT_URI | Invalid URI(s) <uri(s)>. | redirect-uris contain invalid URI string format or an URI with fragment. |
| 400 | INVALID_CLIENT_METADATA | Missing attribute | Missing required attribute. |
| 400 | INVALID_CLIENT_METADATA | Client credentials must not be public | Grant 'client credentials' cannot be used with confidentiality 'public'. |
| 400 | INVALID_CLIENT_METADATA | Invalid validFrom attribute | valid_from set to a past date. |
| 400 | INVALID_CLIENT_METADATA | Invalid client identifier | The submitted client identifier is either not unique within the setup or contains invalid characters. |
| 400 | INVALID_CLIENT_METADATA | Invalid client secret | The submitted client secret contains invalid characters. |
| 400 | INVALID_CLIENT_METADATA | Invalid scope | Non-existing scope name. |
| 400 | INVALID_CLIENT_METADATA | Invalid response type for implicit grant | The response type for the implicit grant must be "token" and "id_token". |
| 400 | INVALID_CLIENT_METADATA | Invalid response type for authorization code grant | The response type for the authorization code grant must be "token" and "id_token". |
| 400 | INVALID_CLIENT_METADATA | Data too long for the column <field name> | The length is over the maximum. |