Hi,
I saw that the inspector was not working on the sandbox.
https://sandbox.babylonjs.com/
I tried to find where the bug was and I saw that if I replaced the preview.babylonjs.com version of the inspector by the cdn.babylonjs.com version it work.
I think it was working yesterday so it must be an update from the last 30 hours that brock it.
Good catch
will fix it asap!
Is this related ? i'm not able to use the inspector anymore :

Yes, it is related. I'm working on a fix right now, will commit a fix later today.
The sandbox now works, with a small issue of missing GUI elements.
The inspector is not working outside the sandbox either.
Running:
scene.debugLayer.show();
Gives the following error:
Inspector.ts:190 Uncaught ReferenceError: Split is not defined
at new e (Inspector.ts:190)
at t._createInspector (babylon.js:30)
at t.show (babylon.js:30)
at
Thanks!
It was merged a few minutes ago:)
I will push a nightly asap