打开app闪退

平板电脑 安卓4.4版本打开闪退

报错：TypeError: Cannot read property 'length' of null
1at trigger (file:///storage/emulated/0/Android/data/io.dcloud.HBuilder/apps/HBuilder/www/js/mui.js:2233:23)
at file:///storage/emulated/0/Android/data/io.dcloud.HBuilder/apps/HBuilder/www/js/mui.js:2337:6