GULP crashes, loads up and immediately crashes, what should I do?

Question

gulp.js

Good afternoon. I keep gulp crashing when I run it on the "gulp watch" job command line. Below is
the gulpfile.js code

'use strict';

let gulp         = require('gulp'),
  sass         = require('gulp-sass'),
  browserSync  = require('browser-sync'),
  autoprefixer = require('gulp-autoprefixer'),
  concat       = require('gulp-concat'),
  gcssmq       = require('gulp-group-css-media-queries'),
  uglify       = require('gulp-uglifyjs'),
  cssnano      = require('gulp-cssnano'),
  cssrename       = require('gulp-rename'),
  del          = require('del');

let options = {
  fonts: './app/fonts/**/*',
  scss: './app/sass/**/*.scss',
  css: './app/css/',
  cssfile: './app/css/**/*.css',
  cssmin: './app/css/**/*.min.css',
  cssDest: './app/css/',
  serverSync: './app',
  js: './app/js/**/*.js',
  html: './app/**/*.html',
  jquery: './app/libs/jquery/dist/jquery.min.js',
  
};


gulp.task('sass', function() {
  return gulp.src(options.scss)
  .pipe(sass().on('error', sass.logError))
  .pipe(autoprefixer({
            browsers: ['last 40 versions', '> 1%'],
            cascade: true
    }))
  // .pipe(gcssmq())
  .pipe( gulp.dest(options.css))
  .pipe( browserSync.reload({stream: true}));
});

gulp.task('cssnano', ['sass'], function() {
  return gulp.src(options.cssfile)
  .pipe(cssnano())
  .pipe(cssrename({
            suffix: '.min'

  }))
  .pipe(gulp.dest(options.cssDest));
});

gulp.task('browser-sync', function(){
  browserSync({
    server: {
      baseDir: 'app'
    },
    notify: false

  });
});


gulp.task('scripts', function(){
  return gulp.src([
    'app/jquery-3.1.1.js',
    'app/libs/magnific-popup/dist/jquery.magnific-popup.min.js'
    ])
  .pipe(concat('libs.min.js'))
  .pipe(uglify())
  .pipe(gulp.dest('app/js'));
});


gulp.task('css-libs', ['sass'], function(){
  return gulp.src(['app/css/libs.css',
            'app/css/material-icons.css'])
  .pipe(cssnano())
  .pipe(cssrename({suffix: '.min'}))
  .pipe(gulp.dest('app/css'));
});


gulp.task('watch', ['browser-sync', 'css-libs', 'scripts' ], function(){
  gulp.watch('app/sass/**/*.scss', ['sass']);
  gulp.watch('app/**/*.html', browserSync.reload);
  gulp.watch('app/js/**/*.js', browserSync.reload);
});

What to do how to fix. I am also attaching a command line screenshot.