突然间措不及防地无法在层级管理器中创建UI和渲染节点了（不论是新建项目还是之前的项目），从1.1到1.2的各个版本都试过了，都是这样。拷贝和从控件库中创建没有问题，项目再模拟器和各平台中运行也没问题。
一创建节点就输出
Error: [AssetLibrary] loading JSON or dependencies failed: Can not get asset url by uuid 1f55e3be-b89b-4b79-88de-47fd31018044
at . (C:\CocosCreator120\resources\engine\cocos2d\core\platform\CCAssetLibrary.js:192:25)
at C:\CocosCreator120\resources\engine\cocos2d\core\load-pipeline\CCLoader.js:193:42
at C:\CocosCreator120\resources\engine\cocos2d\core\platform\utils.js:38:21
at combinedTickCallback (internal/process/nexttick.js:67:7)
at process.tickCallback (internal/process/nexttick.js:98:9)
另外，账号也登陆不了
