resolve with null

Author: InventivetalentDev

src/model/index.js

@@ -703,6 +703,7 @@ let createCube = function (width, height, depth, name, faces, fallbackFaces, tex
                     let img = new Image();
                     img.onerror = function(err){
                         console.warn(err);
+                        resolve(null);
                     };
                     img.onload = function () {
                         let uv = face.uv;