Cant gulp serve the project

[Black4ce]

if im using gulp serve i get the following error

E:\Project\blur-admin>gulp serve AssertionError [ERR_ASSERTION]: Task function must be specified at Gulp.set [as _setTask] (E:\Project\blur-admin\node_modules\undertaker\lib\set-task.js:10:3) at Gulp.task (E:\Project\blur-admin\node_modules\undertaker\lib\task.js:13:8) at Object.<anonymous> (E:\Project\blur-admin\gulp\build.js:28:6) at Module._compile (internal/modules/cjs/loader.js:1063:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10) at Module.load (internal/modules/cjs/loader.js:928:32) at Function.Module._load (internal/modules/cjs/loader.js:769:14) at Module.require (internal/modules/cjs/loader.js:952:19) at require (internal/modules/cjs/helpers.js:88:18) at E:\Project\blur-admin\gulpfile.js:13:3 { generatedMessage: false, code: 'ERR_ASSERTION', actual: false, expected: true, operator: '==' }

im using gulp 4.0.0

line 13:3 im gulpfile is:

require('./gulp/' + file);

wrench.readdirSyncRecursive('./gulp').filter(function(file) { return (/\.(js|coffee)$/i).test(file); }).map(function(file) { require('./gulp/' + file); });

[nitinmukesh]

I am getting the following error

C:\blur-admin-master>gulp server
ReferenceError: primordials is not defined
at fs.js:45:5
at req_ (C:\Users\nitin\Desktop\blur-admin-master\node_modules\natives\index.js:143:24)
at Object.req [as require] (C:\Users\nitin\Desktop\blur-admin-master\node_modules\natives\index.js:55:10)
at Object. (C:\Users\nitin\Desktop\blur-admin-master\node_modules\vinyl-fs\node_modules\graceful-fs\fs.js:1:37)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)

[zhangvqian]

I have got the same error : AssertionErroor [ERR_ASSERTION]: Task never defined:inject.