报错FATAL Cannot read property 'replace' of null

FATAL Cannot read property 'replace' of null
TypeError: Cannot read property 'replace' of null
    at fs.exists.then.then.then.config (D:\blog\leevisin\node_modules\hexo\lib\hexo\load_config.js:34:31)
    at tryCatcher (D:\blog\leevisin\node_modules\bluebird\js\release\util.js:16:23)
    at Promise._settlePromiseFromHandler (D:\blog\leevisin\node_modules\bluebird\js\release\promise.js:512:31)
    at Promise._settlePromise (D:\blog\leevisin\node_modules\bluebird\js\release\promise.js:569:18)
    at Promise._settlePromise0 (D:\blog\leevisin\node_modules\bluebird\js\release\promise.js:614:10)
    at Promise._settlePromises (D:\blog\leevisin\node_modules\bluebird\js\release\promise.js:694:18)
    at _drainQueueStep (D:\blog\leevisin\node_modules\bluebird\js\release\async.js:138:12)
    at _drainQueue (D:\blog\leevisin\node_modules\bluebird\js\release\async.js:131:9)
    at Async._drainQueues (D:\blog\leevisin\node_modules\bluebird\js\release\async.js:147:5)
    at Immediate.Async.drainQueues [as _onImmediate] (D:\blog\leevisin\node_modules\bluebird\js\release\async.js:17:14)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)

之前配置
url: https://leevisin.github.io/
root:

在_config.yml文件中的root下改为如下
url: https://leevisin.github.io/
root: /

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参考文献

hexo issues #2006