新建的项目 ，版本2.1.2 ，没有代码就一直报这个错。
at /Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/engine-extends/asset-library-extends.js:1:1567
2019-09-10T03:51:50.047Z - error: TypeError: Cannot read property ‘_texture’ of null
at cc_Label._activateMaterial (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/engine/bin/.cache/dev/cocos2d/core/components/CCLabel.js:422:64)
at cc_Label.set (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/engine/bin/.cache/dev/cocos2d/core/components/CCRenderComponent.js:44:30)
at cc_Label.a.set (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:973)
at cc_Label.a.set (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:973)
at cc_Label.a.set (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:973)
at cc_Label.a.set [as sharedMaterials] (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:973)
at i (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:1203)
at /Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/lib/asset-watcher.js:1:2673
at CallbacksInvoker.invoke (/Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/engine/bin/.cache/dev/cocos2d/core/platform/callbacks-invoker.js:167:29)
at /Users/yonghe/Desktop/CocosCreator212.app/Contents/Resources/app.asar/editor/page/scene-utils/engine-extends/asset-library-extends.js:1:1567
