Cesium Sudden fail

Cesium for Unity
1

Suddenly got error "NotImplementedException: The native implementation is missing so Update cannot be invoked. This may be caused by a missing call to CreateImplementation in one of your constructors, or it may be that the entire native implementation shared library is missing or out of date.
CesiumForUnity.Cesium3DTileset.Update () (at ./Library/PackageCache/com.cesium.unity/Runtime/generated/Reinterop.RoslynSourceGenerator/Cesium3DTileset-generated.cs:734)

" may be cesium have change native!

2

Hi @Kyaw_Zin_Htun, welcome to the community!
Do you know what you were doing when that error first appeared? If you had just updated Cesium for Unity, you may just need to restart the Unity Editor so that the new native code can be loaded.