Under metronic 4.5.7 development environment on Windows 10 after the 10.16.0 version of node js installation, resulting in node sass could not be loaded

Solution: Modify package.json file metronic in the dependency gulp-sass version 3.2.1 can be changed to solve

{
  "name": "metronic",
  "version": "4.5.7",
  "description": "Metronic by Keenthemes",
  "main": "gulpfile.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "gulp": "^4.0.2",
    "gulp-connect": "^5.7.0",
    "gulp-ignore": "^2.0.1",
    "gulp-minify-css": "^1.2.1",
    "gulp-prettify": "^0.5.0",
    "gulp-rename": "^1.2.2",
    "gulp-rtlcss": "^0.1.4",
    "gulp-sass": "^3.2.1",
    "gulp-sourcemaps": "^1.5.2",
    "gulp-uglify": "^1.4.2"
  }
}