I can't use gltf models

I can load with GLTFLoader online files( loader.load(‘https://file.glt’,…) and it works as expected but i can’t use models from loader.load(‘scene.gltf’,…). The error is: Event {isTrusted: true, type: “error”, target: img, currentTarget: img, eventPhase: 2, …}.

https://jsfiddle.net/GrassKnuckles/7a1uz2bc/ - online link is working and link to my web page directory doesn’t

The idea is to share a running live example. Or a github repository for debugging. You just copy/pasted your code into the fiddle…

It’s imposible for me to set all libraries in fiddle and makes it work together. Only 1 raw is interesting for me:
loader.load(‘https://docs.mapbox.com/mapbox-gl-js/assets/34M_17/34M_17.gltf’) - works
loader.load(‘scene.gltf’) - doesn’t work
Why? And how to fix it?

http://jsfiddle.net/GrassKnuckles/5vpgm376/19/ - this one is working. But this example works with loader.load(‘scene.gltf’,…). But this doesn’t work with VueJs like in example higher.

OK. Now it’s works. But only because i convert gltf to glb file. And i have any idea why.