Openmaptiles TileServer PHP自定义样式

Question

I try to host mbtiles with php tileserver and I followed the given install. Alone the downloaded tile is working but I have problems to apply the styles on it

the javascript what I use

import mapboxgl from 'mapbox-gl'

    let map1 = new mapboxgl.Map({
      container: 'map-2',
      style: 'style-cdn.json'
    });

    map1.addControl(new mapboxgl.NavigationControl());

What does this error means?