2. Disable streaming and sandboxing
The camera system doesn't work with streaming enabled and the model has to have sandboxing disabled to load correctly. This page explains how to disable both of them.
Streaming
To disable streaming, select Workspace and in the properties window untick StreamingEnabled.
Click here for more information.
Sandboxing
To disable sandboxing, select Workspace and change SandboxedInstanceMode to Experimental (if it isn't already). After that, select both the main CameraSystem folder and the Loader script, and in the properties window untick Sandboxed. You can change SandboxedInstanceMode back to Default if you wish, although that's not required.