I have some issues with the coordinate system of the model while uploading it to Cesium ion. It says that the issue is because the model is not in the local coordinate system, but in RC it says that it does. Even if I try to fix it in Cesiu ion, the option “Adjust Tileset Location” is not working.
Are you using the built-in Cesium Ion uploader in RC or exporting the tileset first and uploading it to Cesium manually? If you are using the manual export and upload please screenshot your settings.