Babylonjs Sample on tap gets error 'Wrong sceneFilename parameter'

[JessePerry]

When trying the sample for BabylonJS, if you tap the scene then nothing happens on iOS.

When I connect the Safari inspector I see the error is related to babylons requirement of the scene name being provided. The error in console is:
Wrong sceneFilename parameter
Here is a breakpoint which also shows the filepath coming in, apparently it can't start with / if a scenename is not provided.

In the example code, it is this part that determines what is sent to Babylonjs to load the scene.

web/examples/babylonjs/placeground/index.js

Line 47 in dcc11ab

BABYLON.SceneLoader.ImportMesh(