Error upon relaunching Unity project

This happens every time I relaunch my project.

Hi @kot.andrei.mail, welcome to the community forums and thank you for the question! What token are you trying to use with Cesium ion? Can you confirm it has access to the Cesium OSM Buildings dataset? That is, if you go to Cesium ion do you see Cesium OSM Buildings listed?

Hello. I am using the token I created through Unity’s Cesium tab. Then I checked it and yes, it has access to Cesium OSM buildings dataset.