Add troubleshooting steps for AladdinConnect OAuth credentials (#33352)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: Adam Johnston <Adam_Johnston@geniecompany.com>
Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_integrations/aladdin_connect.markdown

@@ -24,3 +24,9 @@ Only doors that are owned by your Aladdin Connect account will be available. Doo
 </div>
 
 {% include integrations/config_flow.md %}
+
+## Troubleshooting
+If you see the below attached screen instead of the login page, please ensure that your
+{% term "`configuration.yaml`" %} file includes either a [`default_config:`](/integrations/default_config/) or [`cloud:`](/integrations/cloud/) section.
+
+![OAuth Error Screen](/images/integrations/aladdin_connect/oauth-screenshot.png)