Error on running the command of npm run test:visual

[JacobWay]

When I clone the project, and run the command npm run test:visual in package.json from console, I get the error below:

> foundation-docs@0.2.1 test:visual /Users/somebody/project/foundation-docs
> gulp

(node:77316) ExperimentalWarning: The fs.promises API is experimental
[09:41:46] Using gulpfile ~/project/foundation-docs/gulpfile.js
[09:41:46] Starting 'default'...
[09:41:46] Starting 'build'...
[09:41:46] Starting 'pages'...
[09:41:46] Starting 'sass'...
[09:41:46] Starting 'javascript'...
[09:41:46] Supercollider: processed compatibility.html in 0.98 s
[09:41:46] Finished 'javascript' after 611 ms
[09:41:46] Supercollider: processed component.html in 0.02 s with sass, js
[09:41:46] Supercollider: processed index.html in 0.65 s
[09:41:46] Supercollider: processed kitchen-sink.html in 0.66 s
[09:41:47] Finished 'pages' after 961 ms
[09:41:47] The following tasks did not complete: default, build, sass
[09:41:47] Did you forget to signal async completion?
fs.js:140
  throw new ERR_INVALID_CALLBACK();
  ^

TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
    at maybeCallback (fs.js:140:9)
    at Object.fs.writeFile (fs.js:1258:14)
    at /Users/somebody/project/foundation-docs/node_modules/supercollider/lib/buildSearch.js:62:8
    at /Users/somebody/project/foundation-docs/node_modules/mkdirp/index.js:48:26
    at FSReqWrap.oncomplete (fs.js:166:5)
[1]    77315 segmentation fault  npm run test:visual

I'm trying to solve this problem, and google the error. There are some information to tell the error is related to the gulp version. And I am trying to rewrite the gulpfile.js.

At the same time, I wonder anybody has met the problem, and has some resolution.

By the way, my gulp version is 4.0.0.
Thanks at advance.

My package.json file:

{
  "name": "foundation-docs",
  "version": "0.2.1",
  "description": "Common templates and utilities for the Foundation family documentation.",
  "main": "index.js",
  "scripts": {
    "test": "npm run test:unit",
    "test:unit": "mocha test/unit/*.js --compilers js:@babel/register",
    "test:visual": "gulp"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/zurb/foundation-docs.git"
  },
  "keywords": [
    "foundation",
    "docs"
  ],
  "author": "ZURB <foundation@zurb.com> (http://foundation.zurb.com)",
  "license": "MIT",
  "bugs": {
    "url": "https://github.com/zurb/foundation-docs/issues"
  },
  "homepage": "https://github.com/zurb/foundation-docs#readme",
  "engines": {
    "node": ">=6.4.0",
    "npm": ">=2.14.2"
  },
  "dependencies": {
    "cheerio": "^1.0.0-rc.2",
    "handlebars": "^4.0.12",
    "highlight.js": "^9.0.0",
    "inky": "^1.2.6",
    "js-beautify": "^1.6.2",
    "kebab-case": "^1.0.0",
    "marked": "^0.5.0",
    "mkdirp": "^0.5.1",
    "multiline": "^1.0.2",
    "querystring": "^0.2.0",
    "require-dir": "^1.0.0",
    "string-template": "^1.0.0",
    "strip-indent": "^2.0.0"
  },
  "devDependencies": {
    "@babel/core": "^7.1.2",
    "@babel/preset-env": "^7.1.0",
    "@babel/register": "^7.0.0",
    "autoprefixer": "^9.1.5",
    "browser-sync": "^2.11.1",
    "chai": "^4.1.2",
    "foundation-sites": "^6.2.0",
    "gulp": "^4.0.0",
    "gulp-concat": "^2.6.0",
    "gulp-load-plugins": "^1.2.0",
    "gulp-postcss": "^8.0.0",
    "gulp-sass": "^4.0.1",
    "mocha": "^5.2.0",
    "motion-ui": "^2.0.3",
    "node-sass": "^4.9.3",
    "panini": "^1.2.0",
    "rimraf": "^2.5.2",
    "striptags": "^3.1.1",
    "supercollider": "^1.4.4"
  }
}