My friend has this exact code, and is able to run gulp with no problems, but I can't seem to compile the css or js files. I am able to run gulp with no problems or errors in the terminal but it does not make any css or js destination file or the folders themselves.

This is my gulp file:

const gulp = require('gulp');

const sass = require('gulp-sass')(require('sass'));
const cssnano = require('gulp-cssnano');
const rev = require('gulp-rev');
const uglify = require('gulp-uglify-es').default;
const imagemin = require('gulp-imagemin');
const del = require('del');


gulp.task('css', function(done){
    console.log('minifying css...');
    gulp.src('./assets/sass/**/*.scss')
    .pipe(sass())
    .pipe(cssnano())
    .pipe(gulp.dest('./assets/css'));

     gulp.src('./assets/**/*.css')
    .pipe(rev())
    .pipe(gulp.dest('./public/assets'))
    .pipe(rev.manifest({
        cwd: 'public',
        merge: true
    }))
    .pipe(gulp.dest('./public/assets'));
    done();
});


gulp.task('js', function(done){
    console.log('minifying js...');
     gulp.src('./assets/**/*.js')
    .pipe(uglify())
    .pipe(rev())
    .pipe(gulp.dest('./public/assets'))
    .pipe(rev.manifest({
        cwd: 'public',
        merge: true
    }))
    .pipe(gulp.dest('./public/assets'));
    done()
});


gulp.task('images', function(done){
    console.log('compressing images...');
    gulp.src('./assets/**/*.+(png|jpg|gif|svg|jpeg)')
    .pipe(imagemin())
    .pipe(rev())
    .pipe(gulp.dest('./public/assets'))
    .pipe(rev.manifest({
        cwd: 'public',
        merge: true
    }))
    .pipe(gulp.dest('./public/assets'));
    done();
});


// empty the public/assets directory
gulp.task('clean:assets', function(done){
    del.sync('./public/assets');
    done();
});

gulp.task('build', gulp.series('clean:assets', 'css', 'js', 'images'), function(done){
    console.log('Building assets');
    done();
});

Can somebody please help me!!