mac用cocos new 新项目，无改动。
导入webstorm，点Edit Configurations, 创建JavaScript Debug，url链接到index.html. 然后点击Debug运行游戏。就报错了。
Error in event handler for (unknown): Cannot read property ‘appendChild’ of null
Stack trace: TypeError: Cannot read property ‘appendChild’ of null
at chrome-extension://fpdnjdlbdmifoocedhkighhlbchbiikl/include.postload.js:1:10463
at messageListener (extensions::messaging:343:9)
at Function.target.(anonymous function) (extensions::SafeBuiltins:19:14)
at EventImpl.dispatchToListener (extensions::event_bindings:397:22)
at Function.target.(anonymous function) (extensions::SafeBuiltins:19:14)
at Event.publicClass.(anonymous function) (extensions::utils:93:26)
at EventImpl.dispatch_ (extensions::event_bindings:379:35)
at EventImpl.dispatch (extensions::event_bindings:403:17)
at Function.target.(anonymous function) (extensions::SafeBuiltins:19:14)
at Event.publicClass.(anonymous function) (extensions::utils:93:26) extensions::uncaught_exception_handler
11
handler extensions::uncaught_exception_handler11
exports.handle extensions::uncaught_exception_handler:15:3
EventImpl.dispatch_ extensions::event_bindings:384:9
EventImpl.dispatch extensions::event_bindings:403:17
target.(anonymous function) extensions::SafeBuiltins
publicClass.(anonymous function) extensions::utils:93:26
dispatchOnMessage extensions::messaging:307:22
Cocos2d-JS v3.0 Final CCDebugger.js:334:36
是设置问题么？求解，虽然不影响操作。