less-plugin-autoprefix: ENOENT Error

Receive error:

lmauldin@9c68fd81e7d7:/var/www/html/pmtool/erp-extender/pms420$ ./node_modules/.bin/gulp less
[15:24:43] Using gulpfile /var/www/html/pmtool/erp-extender/pms420/gulpfile.js
[15:24:43] Starting 'less'...
Potentially unhandled rejection [2] Error: ENOENT, open '<input css 1>'
    at Error (native)

Relevant gulp file:

gulp.task("less", function() {
    var cleancss = new lessPluginCleanCSS({ advanced: true });
   var autoprefix= new lessPluginAutoPrefix({browsers: ["last 2 versions"]});
    //return gulp.src(['./assets/styles/application.less', './assets/styles/*/*.less'])
    return gulp.src(['./assets/styles/application.less'])
        .pipe(sourcemaps.init())
        .pipe(less({
            plugins: [autoprefix]
        }))
        .pipe(sourcemaps.write()) //.pipe(sourcemaps.write('./maps'))
        .pipe(gulp.dest('./webroot/styles'));
});