Cesium not connect to Cesium ion

I downloaded the latest version (2.13.3) of Cesium for UE 5.4, I click on the “connect” button, loading appears for a moment, and then nothing happens. I can try to connect endlessly many times, but I just don’t have time to click anything from what is offered (I mean the “copy url” and “open browser again” buttons)
Запись 2025-02-13 170949

The site also doesn’t work for me

May be related: Cesium ion to block access from Russia in compliance with new U.S. regulations