未处理的拒绝类型错误：无法读取未定义的属性“父级”

Question

at Function.exports.update (d:\node\pachong\node_modules\cheerio\lib\parse.js:69:26)

at module.exports (d:\node\pachong\node_modules \cheerio\lib\parse.js:19:11)

at Function.exports.load (d:\node\pachong\node_modules\cheerio\lib\static.js:27:14)

at filterchapter (d:\node\pachong\promise_crawler.js:9:16)

at d:\node\pachong\promise_crawler.js:100:15

at Array .forEach ()

at d:\node\pachong\promise_crawler.js:99:8

at tryCatcher (d:\node\pachong\node_modules\bluebird\js \release\util.js:16:23)

at Promise._settlePromiseFromHandler (d:\node\pachong\node_modules\bluebird\js\release\promise.js:512:31)

at Promise._settlePromise (d:\node\pachong\node_modules\bluebird\js\release\promise.js:569:18)

at Promise._settlePromise0 (d:\node\pachong\node_modules\bluebird \js\release\promise.js:614:10)

at Promise._settlePromises (d:\node\pachong\node_modules\bluebird\js\release\promise.js:693:18)

at Promise._fulfill (d:\node\pachong\node_modules\bluebird\js\release\promise.js:638:18)

at PromiseArray._resolve (d:\node\pachong\node_modules \bluebird\js\release\promise_array.js:126:19)

at PromiseArray._promiseFulfilled (d:\node\pachong\node_modules\bluebird\js\release\promise_array.js:144:14)

at Promise._settlePromise (d:\node\pachong\node_modules\bluebird\js\release\promise.js:574:26)