为了达到PC端SEO前端完美的优化，此次项目使用了nuxtjs
刚做了两个页面，突然一早上运行项目出现报错了，怎么也看不出具体原因

问题：Error: Rule can only have one resource source (provided resource and test + include + exclude)

Error: Rule can only have one resource source (provided resource and test + include + exclude) in
 "exclude": [
    null
  ],
  "use": [
    {
      "loader": "/Users/juanpablo/front-treatments/node_modules/cache-loader/dist/cjs.js",
      "options": {
        "cacheDirectory": "/Users/juanpablo/front-treatments/node_modules/.cache/babel-loader",
        "cacheIdentifier": "81fef5a6"
      },
      "ident": "clonedRuleSet-38[0].rules[0].use[0]"
    },
    {
      "loader": "/Users/juanpablo/front-treatments/node_modules/babel-loader/lib/index.js",
      "options": "undefined",
      "ident": "undefined"
    }
  ]
} ````
A complete log of this run can be found in:
0 info it worked if it ends with ok
1 verbose cli [
1 verbose cli   '/Users/juanpablo/.nvm/versions/node/v12.19.0/bin/node',
1 verbose cli   '/Users/juanpablo/.nvm/versions/node/v12.19.0/bin/npm',
1 verbose cli   'run',
1 verbose cli   'serve'
1 verbose cli ]
2 info using npm@6.14.8
3 info using node@v12.19.0
4 verbose run-script [ 'preserve', 'serve', 'postserve' ]
5 info lifecycle vue-dashboard@0.1.0~preserve: vue-dashboard@0.1.0
6 info lifecycle vue-dashboard@0.1.0~serve: vue-dashboard@0.1.0
7 verbose lifecycle vue-dashboard@0.1.0~serve: unsafe-perm in lifecycle true
8 verbose lifecycle vue-dashboard@0.1.0~serve: PATH: /Users/juanpablo/.nvm/versions/node/v12.19.0/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/juanpablo/front-treatments/node_modules/.bin:/Users/juanpablo/.nvm/versions/node/v12.19.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/juanpablo/.rvm/bin
9 verbose lifecycle vue-dashboard@0.1.0~serve: CWD: /Users/juanpablo/front-treatments
10 silly lifecycle vue-dashboard@0.1.0~serve: Args: [ '-c', 'vue-cli-service serve' ]
11 silly lifecycle vue-dashboard@0.1.0~serve: Returned: code: 1  signal: null
12 info lifecycle vue-dashboard@0.1.0~serve: Failed to exec serve script
13 verbose stack Error: vue-dashboard@0.1.0 serve: `vue-cli-service serve`
13 verbose stack Exit status 1
13 verbose stack     at EventEmitter.<anonymous> (/Users/juanpablo/.nvm/versions/node/v12.19.0/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:332:16)
13 verbose stack     at EventEmitter.emit (events.js:314:20)
13 verbose stack     at ChildProcess.<anonymous> (/Users/juanpablo/.nvm/versions/node/v12.19.0/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack     at ChildProcess.emit (events.js:314:20)
13 verbose stack     at maybeClose (internal/child_process.js:1021:16)
13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:286:5)
14 verbose pkgid vue-dashboard@0.1.0
15 verbose cwd /Users/juanpablo/front-treatments
16 verbose Darwin 19.6.0
17 verbose argv "/Users/juanpablo/.nvm/versions/node/v12.19.0/bin/node" "/Users/juanpablo/.nvm/versions/node/v12.19.0/bin/npm" "run" "serve"
18 verbose node v12.19.0
19 verbose npm  v6.14.8
20 error code ELIFECYCLE
21 error errno 1
22 error vue-dashboard@0.1.0 serve: `vue-cli-service serve`
22 error Exit status 1
23 error Failed at the vue-dashboard@0.1.0 serve script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]

后面在网上搜搜到类似的报错，原来是webpack版本问题

原因分析如下：
package.json中webpack版本冲突问题。

解决方法如下：
命令删除webpack，重新装以前的版本。
1、npm uninstall webpack
npm install webpack@^4.0.0 --save-dev