Why is the watch method not working in gulp.js?

Question

gulp.js

I have a simple gulpfile.
I want to run the gulp-less plugin in tracking mode, but it gives me a line with errors.

Answer 1

Use instead of ['gulp-less'] line 14 gulp.parallel('less')

Answer 2

14 line. In square brackets, you should have just written "less", not "gulp-less"