小白一枚，按着教程尝试使用egret发布微信小游戏时碰到了如下报错，我也不知道是哪一段代码有问题因为这个'isCanvas'应该是egret里面所带的代码，麻烦各位大神帮忙看看，太谢谢啦！ gameThirdScriptError Cannot set property 'isCanvas' of undefined TypeError: Cannot set property 'isCanvas' of undefined     at http://127.0.0.1:35203/game/egret.wxgame.js:6067:33     at require (http://127.0.0.1:35203/game/__dev__/WAGame.js:2:94321)     at http://127.0.0.1:35203/game/__dev__/WAGame.js:2:93931     at http://127.0.0.1:35203/game/game.js:6:1     at require (http://127.0.0.1:35203/game/__dev__/WAGame.js:2:94321)     at <anonymous>:1:1     at HTMLScriptElement.scriptLoaded (<anonymous>:18:21)     at HTMLScriptElement.script.onload (<anonymous>:30:20) [图片]