Error: Assets could not be loaded.

{"/assets/no-optimization/spine/main/main.png":"Couldn't load image: /assets/no-optimization/spine/main/main.png","/assets/no-optimization/spine/main/main.atlas":"Couldn't load texture atlas /assets/no-optimization/spine/main/main.atlas page image: /assets/no-optimization/spine/main/main.png"}