theme-next-docs Unhandled rejection TypeError: path.substring is not a function

hexo g

Unhandled rejection TypeError: path.substring is not a function at Object.urlForHelper (/Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/lib/plugins/helper/url_for.js:9:31) at wrapper (/Users/jack/ProjectsMy/hexo-jacks/node_modules/lodash/lodash.js:4962:19) at eval (eval at (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:498:13), :28:119) at Object.exports.each (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/utils.js:45:11) at eval (eval at (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:498:13), :21:10) at Object.eval [as tpl] (eval at (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:498:13), :38:3) at compiled (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:619:18) at Object.eval [as tpl] (eval at (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:498:13), :334:138) at compiled (/Users/jack/ProjectsMy/hexo-jacks/node_modules/swig/lib/swig.js:619:18) at _compiled (/Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/lib/theme/view.js:127:30) at View.render (/Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/lib/theme/view.js:29:15) at /Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/lib/hexo/index.js:387:25 at tryCatcher (/Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/node_modules/bluebird/js/release/util.js:16:23) at /Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/node_modules/bluebird/js/release/method.js:15:34 at RouteStream._read (/Users/jack/ProjectsMy/hexo-jacks/node_modules/hexo/lib/hexo/router.js:134:3) at RouteStream.Readable.read (stream_readable.js:336:10) at resume (_stream_readable.js:726:12) at _combinedTickCallback (node.js:377:13) at process._tickCallback (node.js:401:11)