Please replace the gulpfile.js and package json file in the folder. make sure delete package-lock.json and node_modules
{"name": "atmos-admin-panel","version": "1.0.0","description": "A beautiful Design System build on Bootstrap 4.","main": "gulpfile.js","author": "atomui.com","scripts": {"test": "echo \"Error: no test specified\" && exit 1"},"devDependencies": {"@babel/core": "^7.11.6","@babel/preset-env": "^7.11.5","browser-sync": "^2.26.12","gulp": "^4.0.2","gulp-autoprefixer": "^7.0.1","gulp-babel": "^8.0.0","gulp-cached": "^1.1.1","gulp-clean": "^0.4.0","gulp-clean-css": "^4.3.0","gulp-file-include": "^2.2.2","gulp-gh-pages": "^0.5.4","gulp-html-extend": "^1.1.6","gulp-if": "^3.0.0","gulp-markdown": "^5.1.0","gulp-npm-dist": "^1.0.3","gulp-replace": "^1.0.0","gulp-sass": "^4.1.0","gulp-uglify": "^3.0.2","gulp-useref": "^4.0.1"}}​
const autoprefixer = require('gulp-autoprefixer');const babel = require('gulp-babel');const browsersync = require('browser-sync').create();const clean = require('gulp-clean');const cleancss = require('gulp-clean-css');const gulp = require('gulp');const sass = require('gulp-sass');const rename = require('gulp-rename');​// Extra included dependencies​const {src, task}= require('gulp');​​const paths = {src: {html: {files: './src/html/**/*.html',},js: {files: './src/js/**/*.js'},scss: {files: './assets/scss/atmos.scss'},​},dist: {base: {dir: './'},css: {dir: 'assets/css',files: 'assets/css/**/*.css',minFiles: 'assets/css/**/*.min.css',},html: {files: 'dist/**/*.html'},js: {dir: 'dist/assets/js',files: 'dist/assets/js/**/*.js',minFiles: 'dist/assets/js/**/*.min.js'},},node: {dir: './node_modules'},package: {files: './package.json'}};​gulp.task('browsersync', callback => {browsersync.init({server: {baseDir: paths.dist.base.dir,// Added so that we can have the server use base urls vs requiring .htmlserveStaticOptions: {extensions: ["html"]}}});callback();});​gulp.task('browsersyncReload', callback => {browsersync.reload();callback();});​gulp.task('clean', () => {return gulp.src([paths.dist.css.dir, paths.dist.html.files, paths.dist.js.dir, paths.dist.libs.dir], {allowEmpty: true,read: false}).pipe(clean());});​gulp.task('clean', () => {return gulp.src([paths.dist.css.dir], {allowEmpty: true,read: false}).pipe(clean());});​gulp.task('clean:js', () => {return gulp.src([paths.dist.js.files, `!${paths.dist.js.minFiles}`], {read: false}).pipe(clean())});​gulp.task('js', () => {return gulp.src(paths.src.js.files).pipe(babel({presets: ['@babel/preset-env']})).pipe(gulp.dest(paths.dist.js.dir))});gulp.task('scss', () => {return gulp.src(paths.src.scss.files).pipe(sass().on('error', sass.logError)).pipe(autoprefixer()).pipe(cleancss()).pipe(rename("atmos.min.css")).pipe(gulp.dest(paths.dist.css.dir)).pipe(browsersync.stream());});​gulp.task('watch', () => {gulp.watch([paths.src.html.files],gulp.series('browsersyncReload'));gulp.watch(paths.src.scss.files, gulp.series('scss'));});​gulp.task('default', gulp.series('clean', gulp.parallel( 'scss'), gulp.parallel('browsersync', 'watch')));​