вначале все работает как надо, а потом перестает и выдает такую ошибку.  Did you forget to signal async completion? что делать?
import gulpSass from "gulp-sass";
import nodeSass from "node-sass";
    
const scss = gulpSass(nodeSass);
import {src, dest, watch, parallel, series} from 'gulp';
import concat from'gulp-concat';
import autoprefixer from 'gulp-autoprefixer';
import uglify from'gulp-uglify';
import {deleteAsync} from 'del';
import imagemin, {gifsicle, mozjpeg, optipng, svgo} from 'gulp-imagemin';
import sync from 'browser-sync';
const browserSync = sync.create();
function browsersync(){
   browserSync.init({
      server: {
          baseDir: "app/"
      },
      notify: false
  });
}
function styles(){
    return src('app/scss/style.scss')
     .pipe(scss({outputStyle:'compressed'}))
     .pipe(concat('style.min.css'))
     .pipe(autoprefixer({
        overrideBrowserslist: ['last 10 versions'],
        grid: true
     }))
     .pipe(dest('app/css'))
     .pipe(browserSync.stream())
}
function scripts(){
   return src([
      'node_modules/jquery/dist/jquery.js',
      'app/js/main.js'
   ])
   .pipe(concat('main.min.js'))
   .pipe(uglify())
   .pipe(dest('app/js'))
   .pipe(browserSync.stream())
}
function images(){
   return src('app/images/**/*.*')
   .pipe(imagemin([
      gifsicle({interlaced: true}),
	   mozjpeg({quality: 75, progressive: true}),
	   optipng({optimizationLevel: 5}),
	   svgo({
		plugins: [
			{
				name: 'removeViewBox',
				active: true
			},
			{
				name: 'cleanupIDs',
				active: false
			}
		]
	})
   ]))
   .pipe(dest('dist/images'))
}
function build(){
   return src([
      'app/**/*.html',
      'app/css/style.min.css',
      'app/js/main.min.js'
   ], {base: 'app'})
   .pipe(dest('dist'))
}
function cleanDist(){
   return deleteAsync(['dist']);;
}
function watching(){
   watch(['app/scss/**/*.scss'],styles);
   watch(['app/js/**/*.js', '!app/js/main.min.js'], scripts);
   watch(['app/**/*.html']).on('change', browserSync.reload)
}
export const stylesmin = styles;
export const scriptsmin = scripts;
export const browsersyncrun = browsersync;
export const watchingrun = watching;
export const imagesmin = images;
export const cleandist = cleanDist;
export const buildrun = series(cleanDist, images, build);
export default parallel(styles, scripts, browsersync, watching);