An elevation surface needs to contain supported elevatin information and data source needs to be accessible

[Syahrul_Kamil]

Hi, I try to create a web scene, I have an unknown CRS (local CRS from survey) dataset. First I created a Local Scene in ArcGIS Pro I couldn't add an elevation surface from my DEM there is a statement like this "an elevation surface needs to contain supported elevation information and the data source needs to be accessible", so I used TIN layer as my elevation surface, it's working on ArcGIS Pro but not work in Web Scene. Is there any solution to my problem? I need to create 3D Map using unknown CRS dataset source.