There is no playground link here, as I have sort of problem with the editor. I used some of standard starter templates and it works ok in preview using F5, but when I press Run, there is this error in console and screen is black:
Uncaught (in promise) RuntimeError: Unable to load from ./scenes/_assets/../scene/scene.babylon: loadAssets of scene.babylon from Babylon.JS Editor version: v4.5.0, exporter version: v5.19.0 Lights: Name: sun, type: Directional Materials: Name: default material at RuntimeError.BaseError [as constructor] (error.js:11) at new RuntimeError (error.js:61) at errorHandler (sceneLoader.js:531) at loadAssetContainer (babylonFileLoader.js:487) at Object.load (babylonFileLoader.js:856) at sceneLoader.js:563 at dataCallback (sceneLoader.js:193) at fileTools.js:348 at XMLHttpRequest.onReadyStateChange (fileTools.js:462)
It is probably a bug in editor (I think), but github issues ask to create something in forum first.
This is running in Windows 11.
Note that I make no changes to template whatsoever, it is third person shooter that has this issue right from the box.