Gulp and plumber stop working after bug in code?

Question

JavaScript

The problem with the gallp, I catch errors with a plumber.
After an error in sass stops and after fixing it does not work further

"devDependencies": {
    "browser-sync": "^2.18.8",
    "gulp": "^3.9.1",
    "gulp-cssnano": "^2.1.2",
    "gulp-plumber": "^1.1.0",
    "gulp-rename": "^1.2.2",
    "gulp-sass": "^3.1.0",
    "gulp-util": "^3.0.8",
    "gulp-watch": "^4.3.11",
    "node-notifier": "^5.1.2"
  }

var   gulp         = require('gulp'),
      sass         = require('gulp-sass'),
      browserSync  = require('browser-sync'),
      plumber      = require('gulp-plumber'),
      notifier     = require('node-notifier'),
      gutil        = require('gulp-util'),
      cssnano      = require('gulp-cssnano'),
      rename       = require('gulp-rename');


gulp.task('sass',  () => {
  return gulp.src('app/sass/style.sass')
  .pipe(plumber({
    errorHandler: function (err) {
      gutil.log(err.message);
      notifier.notify({
        title: 'SASS compilation error',
        message: err.message
      });
    }
  }))
  .pipe(sass({
    outputStyle: 'normal',
    sourceMap: false,
    errLogToConsole: true,
    indentedSyntax: true
  }))
  .pipe(gulp.dest('app/css'));
});

gulp.task('css', ['sass'], () => {
  return gulp.src('app/css/style.css')
  .pipe(cssnano())
  .pipe(rename({
    suffix: '.min'
  }))
  .pipe(gulp.dest('app/css'))
  .pipe(browserSync.reload({
    stream: true
  }));
});


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

gulp.task('default', ['css', 'browser-sync'], () => {
  gulp.watch('app/sass/**/*.sass', ['css']);
  gulp.watch('app/*.html', browserSync.reload);
});

Answer 1

gulp.task('css', ['sass'], () => {
gulp.src('app/css/style.css')
.pipe(cssnano())
.pipe(rename({
suffix: '. min'
}))
try so
taken from here https://toster.ru/q/212922 , it helped in due time