Hi Kjell,
We did a major refactor of how we handle resource loading throughout the Cesium code base (#6035), which makes the API a lot cleaner. Since you need to set CESIUM_BASE_URL, I expect some changes to buildModuleUrl may have required you to now set this variable. Could you be more specific about what error you were getting using the minified version so we can see if it’s something that needs cleanup?
Thanks,
Gabby