$ gulp
    assert.js:269
        throw err;
        ^

    AssertionError [ERR_ASSERTION]: Task function must be specified
        at Gulp.set [as _setTask] (C:OSPaneldomainsstore.locnode_modulesundertakerlibset-task.js:10:3)
        at Gulp.task (C:OSPaneldomainsstore.locnode_modulesundertakerlibtask.js:13:8)
        at Object.<anonymous> (C:OSPaneldomainsstore.locgulpfile.js:32:6)
        at Module._compile (internal/modules/cjs/loader.js:689:30)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
        at Module.load (internal/modules/cjs/loader.js:599:32)
        at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
        at Function.Module._load (internal/modules/cjs/loader.js:530:3)
        at Module.require (internal/modules/cjs/loader.js:637:17)
        at require (internal/modules/cjs/helpers.js:20:18)

{
  "name": "store-loc",
  "version": "1.0.0",
  "description": "OpenCart Gulp Project",
  "main": "gulpfile.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "asd-python_01",
  "license": "ISC",
  "devDependencies": {
    "browser-sync": "^2.24.5",
    "gulp": "^4.0.0",
    "gulp-autoprefixer": "^5.0.0",
    "gulp-clean-css": "^3.9.4",
    "gulp-sass": "^4.0.1",
    "gulp-util": "^3.0.8",
    "node-bourbon": "^4.2.8",
    "vinyl-ftp": "^0.6.1"
  },

}

// Подключаем Gulp и все необходимые библиотеки
var     gulp           = require('gulp'),
        gutil          = require('gulp-util' ),
        sass           = require('gulp-sass'),
        browserSync    = require('browser-sync'),
        cleanCSS       = require('gulp-clean-css'),
        autoprefixer   = require('gulp-autoprefixer'),
        bourbon        = require('node-bourbon'),
        ftp            = require('vinyl-ftp');

// Обновление страниц сайта на локальном сервере
gulp.task('browser-sync', function() {
    browserSync({
        proxy: "store.loc",
        notify: false
    });
});

// Компиляция stylesheet.css
gulp.task('sass', function() {
    return gulp.src('catalog/view/theme/woman/stylesheet/stylesheet.sass')
        .pipe(sass({
            includePaths: bourbon.includePaths
        }).on('error', sass.logError))
        .pipe(autoprefixer(['last 15 versions']))
        .pipe(cleanCSS())
        .pipe(gulp.dest('catalog/view/theme/woman/stylesheet/'))
        .pipe(browserSync.reload({stream: true}))
});

// Наблюдение за файлами
gulp.task('watch', ['sass', 'browser-sync'], function() {
    gulp.watch('catalog/view/theme/woman/stylesheet/stylesheet.sass', ['sass']);
    gulp.watch('catalog/view/theme/woman/template/**/*.tpl', browserSync.reload);
    gulp.watch('catalog/view/theme/woman/js/**/*.js', browserSync.reload);
    gulp.watch('catalog/view/theme/woman/libs/**/*', browserSync.reload);
});

// Выгрузка изменений на хостинг
gulp.task('deploy', function() {
    var conn = ftp.create({
        host:      'hostname.com',
        user:      'username',
        password:  'userpassword',
        parallel:  10,
        log: gutil.log
    });
    var globs = [
    'catalog/view/theme/woman/**'
    ];
    return gulp.src(globs, {buffer: false})
    .pipe(conn.dest('/path/to/folder/on/server'));
});

gulp.task('default', gulp.task('watch'))