glup 管理的项目，报错如何解决

Question

执行gulp server 启动后，报错如下截图：
因为没有使用过gulp，想请教一下，这种错误是缺少了gulp什么操作？

gulpfile.js文件如下：

var gulp = require('gulp');
var minifyCss = require('gulp-minify-css');
var uglify = require('gulp-uglify');
var rev = require('gulp-rev');
// var revReplace = require('./plugins/gulp-rev-replace');
var revReplace = require('gulp-rev-replace');
var path = require('path');
var del = require('del');

var yargs = require('yargs').argv;
var url = require('url');
var proxy = require('http-proxy-middleware');
var browserSync = require('browser-sync').create();

var dist = __dirname + '/dist';

function relativePath(revision, file) {
    if (file == undefined) return revision;
    return path.relative(path.dirname(file.relative), path.dirname(revision)) + path.sep + path.basename(revision);
}

gulp.task('clean', function (cb) {
    return del([dist], cb);
});

gulp.task('build:copy:static', ['clean'], function () {
    return gulp
        .src([
            './libs/**/*.*',
            './json/*.json',
            './static/fonts/*.*',
            './static/images/**/*.*',
            './static/lang/*.*'
        ], {
            base: '.'
        })
        .pipe(gulp.dest(dist));
});

gulp.task('build:minify:css', ['clean'], function () {
    return gulp
        .src([
            './static/css/*.css',
            './static/css/app/**/*.css',
            './view/css/**/*.css'
        ], {
            base: '.'
        })
        .pipe(minifyCss())
        .pipe(rev())
        .pipe(gulp.dest(dist))
        .pipe(rev.manifest('rev-manifest-css.json'))
        .pipe(gulp.dest(dist));
});

gulp.task('build:uglify:js', ['clean'], function () {
    return gulp
        .src([
            './static/js/*.js',
            './view/js/**/*.js'
        ], {
            base: '.'
        })
        .pipe(uglify())
        .pipe(rev())
        .pipe(gulp.dest(dist))
        .pipe(rev.manifest('rev-manifest-js.json'))
        .pipe(gulp.dest(dist));
});

gulp.task('build:copy:html', ['clean'], function () {
    return gulp
        .src([
            './static/*.html',
            './view/**/*.html'
        ], {
            base: '.'
        })
        .pipe(gulp.dest(dist));
});

gulp.task('build:revision', ['build:minify:css', 'build:uglify:js', 'build:copy:html'], function () {
    return gulp
        .src([
            dist + '/view/**/*.html',
            dist + '/static/*.html'
        ], {
            base: dist
        })
        .pipe(revReplace({
            manifest: gulp.src(dist + '/rev-manifest-*.json'),
            prefix: '',
            modifyUnreved: relativePath,
            modifyReved: relativePath
        }))
        .pipe(gulp.dest(dist))
        .on('end', function () {
            // del(dist + '/*.json');
        });
});

gulp.task('release', ['build:copy:static', 'build:revision']);

gulp.task('default', ['release']);

gulp.task('server', function () {
    yargs.p = yargs.p || 8080;
    browserSync.init({
        server: {
            baseDir: '.',
            middleware: [
                proxy([
                    '/**',
                    '!/json/*.*',
                    '!/libs/**/*.*',
                    '!/mock/**/*.*',
                    '!/static/**/*.*',
                    '!/view/**/*.*'
                ], {
                    changeOrigin: true,
                    target: 'http://localhost:9527'
                })
            ]
        },
        ui: {
            port: yargs.p + 1,
            weinre: {
                port: yargs.p + 2
            }
        },
        port: yargs.p,
        startPath: '/'
    });

    gulp.watch([
        './json/*.*',
        './libs/**/*.*',
        './static/**/*.*',
        './view/**/*.*'
    ]).on('change', browserSync.reload);
});