cocos creator 打开官网范例，代码中有汉字注释的部分，全是小方框。还有cocos2dx，打开以前的代码文件，注释文件也变成了一堆乱码。打开21点例子，报这个错误。
The Asset used by component “cc.Label” in prefab “rankItem.prefab” is missing. Detailed information:
Node path: “rankItem/iconGold/goldNum”
Asset url: “db://assets/prefabs/rankItem.prefab”
Missing uuid: “67d645ab-1f14-4c86-a929-e644ab31c2a3”
求大神告知怎么回事，应如何改回来。重装cocos creator无效！！！
