添加三级目录后插件失效

[pukguy]

复现方法：在书签栏下添加目录A，在目录A中添加目录B
下面是 Alfred Debug 信息

TypeError: Cannot read property 'name' of null
    at allBookmark.map.val (/Users/didier/.config/Alfred/Alfred.alfredpreferences/workflows/user.workflow.D8C50646-F3EC-4F83-B3C6-D3F022DD25B5/bookmark.js:138:46)
    at Array.map (<anonymous>)
    at getBookmarkInPinYin (/Users/didier/.config/Alfred/Alfred.alfredpreferences/workflows/user.workflow.D8C50646-F3EC-4F83-B3C6-D3F022DD25B5/bookmark.js:137:32)
    at Object.<anonymous> (/Users/didier/.config/Alfred/Alfred.alfredpreferences/workflows/user.workflow.D8C50646-F3EC-4F83-B3C6-D3F022DD25B5/index.js:7:19)
    at Module._compile (internal/modules/cjs/loader.js:738:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:749:10)
    at Module.load (internal/modules/cjs/loader.js:630:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:570:12)
    at Function.Module._load (internal/modules/cjs/loader.js:562:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:801:12)