Your project is missing assets that other users have. This typically occurs when your project is not the same version as the Scene Fusion session host.
Scene Fusion displays a warning about missing assets in the online panel. There may be a warning saying 'Unable to load
Ensure everyone has the same version of the Unreal project by performing the following steps.
If you are out of date with the project in source control:
If you have files not yet committed to source control:
Note: Ensure that the host of the session also has the most up to date version of the project by following the above steps.
What if my team doesn't use source control?
We highly recommend using a source control solution. However, if you are not using source control, you can solve this issue by simply sharing the most up to date version of the Unreal project with everyone who will be using Scene Fusion.