TypeError: fs.rmSync is not a function

[Peter-developer01]

$ ./edit ru ru
[11:09:50] Using gulpfile /media/peter/368C8D4D8C8D0917/js/server/gulpfile.js
[11:09:50] Starting 'edit'...
[11:09:50] Starting 'webpack'...
[11:09:50] Starting 'engine:koa:tutorial:importWatch'...
[11:09:50] Starting 'livereload'...
[11:09:50] Starting 'server'...
(node:9386) DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead
Livereload server listening
[11:10:06] 'webpack' errored after 16 s
[11:10:06] TypeError: fs.rmSync is not a function
    at Object.removeSync (/media/peter/368C8D4D8C8D0917/js/server/node_modules/fs-extra/lib/remove/index.js:11:6)
    at clear (/media/peter/368C8D4D8C8D0917/js/server/modules/config/webpack.js:380:15)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (/media/peter/368C8D4D8C8D0917/js/server/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:5:1)
    at AsyncSeriesHook.lazyCompileHook (/media/peter/368C8D4D8C8D0917/js/server/node_modules/tapable/lib/Hook.js:154:20)
    at /media/peter/368C8D4D8C8D0917/js/server/node_modules/webpack/lib/Compiler.js:315:19
    at AsyncSeriesHook.eval [as callAsync] (eval at create (/media/peter/368C8D4D8C8D0917/js/server/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:13:1)
    at AsyncSeriesHook.lazyCompileHook (/media/peter/368C8D4D8C8D0917/js/server/node_modules/tapable/lib/Hook.js:154:20)
    at Compiler.run (/media/peter/368C8D4D8C8D0917/js/server/node_modules/webpack/lib/Compiler.js:312:24)
    at webpack (/media/peter/368C8D4D8C8D0917/js/server/node_modules/webpack/lib/webpack.js:74:12)
    at /media/peter/368C8D4D8C8D0917/js/server/tasks/webpack.js:9:5
    at new Promise (<anonymous>)
    at module.exports (/media/peter/368C8D4D8C8D0917/js/server/tasks/webpack.js:6:9)
    at /media/peter/368C8D4D8C8D0917/js/server/modules/engine/gulp/requireModuleTasks.js:12:12
    at webpack (/media/peter/368C8D4D8C8D0917/js/server/node_modules/undertaker/lib/set-task.js:13:15)
    at bound (domain.js:427:14)
    at runBound (domain.js:440:12)
[11:10:06] 'edit' errored after 16 s
08:10:06.387Z  INFO application: Boot complete

Why it errors and how can I fix it?