Can you please try accessing this information, using the link below. Please update the link with your tenant name: https://<YOUR TENANT NAME>.goskope.com/apidocs/?include_beta_routes=0#/events/get_api_v2_events_dataexport_events_incident
Additionally, please know that incident data is now in Advanced Analytics as well. If you are looking to answer some questions around incidents or to create some reporting, this may be good tool for you to leverage.
Hope this helps!