I am getting 404 Resource not found errors when trying to view the Cesium imagery.
I can see the request failing when going through /v1/assets/2/endpoint, which I assume is just the IonWorldImageryStyle.AERIAL ion asset value.
Is the aerial imagery asset layer down/missing?
That is a correct assessment of what the endpoint’s for, but we don’t appear to be having a problem serving that URL, and don’t have any reported outages for 13 hours ago - though, a 4xx error for it would be weird for a network issue or outage; you’d normally get a connection refused or a bad gateway.
404 suggests to me you may be hitting the wrong domain - that request would be correctly done on the api.cesium.com domain, not ion.cesium.com.
Let me know if that resolves your issue.