Unhandled rejection TypeError: path.substring is not a functio

[emilywu27]

请问出现这里报错怎么办？我是在添加文件又删除后导致的，改如何解决呢？ Unhandled rejection TypeError: path.substring is not a function at Object.urlForHelper (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/hexo/lib/plugins/helper/url_for.js:7:31) at wrapper (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/lodash/lodash.js:4935:19) at Object.eval [as tpl] (eval at precompile (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/swig-templates/lib/swig.js:537:13), :15:119) at compiled (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/swig-templates/lib/swig.js:664:18) at Object.eval [as tpl] (eval at precompile (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/swig-templates/lib/swig.js:537:13), :985:155) at compiled (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/swig-templates/lib/swig.js:664:18) at Theme._View.View._compiled.locals [as _compiled] (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/hexo/lib/theme/view.js:124:48) at Theme._View.View.View.render (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/hexo/lib/theme/view.js:29:15) at route.set (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/hexo/lib/hexo/index.js:386:29) at tryCatcher (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/bluebird/js/release/util.js:16:23) at /Users/wunan/Documents/Study/MyBlog/hexo/node_modules/bluebird/js/release/method.js:15:34 at RouteStream._read (/Users/wunan/Documents/Study/MyBlog/hexo/node_modules/hexo/lib/hexo/router.js:134:3) at RouteStream.Readable.read (stream_readable.js:442:10) at resume (_stream_readable.js:822:12) at _combinedTickCallback (internal/process/next_tick.js:139:11) at process._tickCallback (internal/process/next_tick.js:181:9)