ios版本9.2.1预览模式不能进去首页，真机调试能进去首页，这是什么情况？

报错信息如下，进不去首页，显示空白！预览模式不能进去首页，真机调试能进去首页

ios版本9.2.1

基础库版本2.9.2

微信版本7.0.8

SyntaxError

at line:5061,column:13838,SyntaxError: Cannot declare a parameter named 'err' as it shadows the name of a strict mode function. Stack: (native code)

at evaluateScriptFile (WAServiceMainContext.js:1:13838)

at value (WAServiceMainContext.js:1:135109)

at (WAServiceMainContext.js:1:136856)

at (WAServiceMainContext.js:1:132725)

at (WAServiceMainContext.js:1:223552)

at (WAServiceMainContext.js:1:222520)

at forEach (native code)

at (WAServiceMainContext.js:1:222484)

at (WAServiceMainContext.js:1:223552)

at b (WAServiceMainContext.js:1:1998)

global code