Google Calendar API: Authorize access to your Google Application

Hi there,
I am trying to upgrade my appointments calendar.
I have entered the client and secret keys, but get a 404 when trying to get the access code.
Here is the error.

400. That’s an error.

Error: redirect_uri_mismatch

Application: Appointements

You can email the developer of this application at: xxxx

The redirect URI in the request, urn:ietf:wg:oauth:2.0:oob, can only be used by a Client ID for native application. It is not allowed for the 'WEB' client type. You can create a Client ID for native application at https://console.developers.google.com/apis/credentials/oauthclient

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Request Details
access_type=offline
approval_prompt=auto
hl=en-US
scope=https://www.googleapis.com/auth/calendar
response_type=code
redirect_uri=urn:ietf:wg:oauth:2.0:oob
client_id=886528108637-dfm20ilip5vjq6nn4iklp7bk2hbmdhc5.apps.googleusercontent

Thanks in advance for advice on this.