Unable to access cesium apis in build

[Kevin_Ring]

Hi @UNES_DEV_2, welcome to the community!
Please see this thread:

KNOWN ISSUE: Tilesets not loading in packaged Unreal apps

Hi all, We’re aware that many users are experiencing issues with loading 3D Tiles in packaged Unreal apps, including those that have been packaged several releases ago. We sincerely apologize for the inconvenience. Our AWS certificates were renewed this week, and we suspect that this is the problem. If you’re experiencing this issue, please try the following workarounds: Clearing the DNS cache on the machine. Delete the cesium-request-cache.sqlite file. I believe this is located in the Engin…

My most recent post in that thread has a command you can run from a PowerShell prompt that should fix this problem by triggering your system to download the necessary certificate:

Invoke-WebRequest "https://api.cesium.com"