diff --git a/source/partials/_authorize-errors.erb b/source/partials/_authorize-errors.erb
index 38a6782..d671417 100644
--- a/source/partials/_authorize-errors.erb
+++ b/source/partials/_authorize-errors.erb
@@ -4,7 +4,8 @@
 | HTTP status response code | Error                                     | More information about your error                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 |------------------|-------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 |000| `unauthorized_client`                     | In rare circumstances, such as a security incident, One Login may prevent users from logging in to your service. If this happens, the error code `unauthorized_client` will be returned with the error description `client deactivated`. When your service receives this error, you must show the user a custom error page to explain that they cannot use your service at the moment and should try again later.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
-|000| `invalid_request`                         | The request has one or more of the following issues: <ul><li>missing a required parameter</li><li>includes an invalid parameter value</li><li>includes a parameter more than once</li><li>not in the correct format</li></ul><br>You can [check which parameters GOV.UK One Login supports when you make an authorisation request][integrate.make-authorization-request].                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
+|400| `Request is missing parameters XXXX`      | The request has one or more of the following issues: <ul><li>missing a required parameter</li><li>includes an invalid parameter value</li><li>includes a parameter more than once</li><li>not in the correct format</li></ul><br>. You should [check you have included the correct parameters][integrate.replace-example-message], especially the `client_id`, `redirect_uri`, `response_type` and `scope` parameters.                                                                                                                                                                                                                                                                                                                                                                                                                                |
+|000| `invalid_request`                         | The request has one or more of the following issues: <ul><li>missing a required parameter</li><li>includes an invalid parameter value</li><li>includes a parameter more than once</li><li>not in the correct format</li></ul><br>. You should [check you have included the correct parameters][integrate.replace-example-message], especially the `client_id`, `redirect_uri`, `response_type` and `scope` parameters.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 |000|`invalid_request - Request vtr not valid` | You've requested single factor authentication and identity information. To make a successful identity request, you must request two-factor authentication and the identity level of confidence, for example `Cl.Cm.P2`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 |000| `invalid_scope`                           | The scope or scopes you have requested are invalid, unknown, or are not in the correct format.<br>You can read more about scopes in [choosing which user attributes your service can request][integrate.choose-user-attributes].                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
 |000| `unsupported_response_type`               | Your service is not registered for the requested `response_type`. <br>You must set the `response_type` to be code: `response_type=code`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |