如何解决（Cannot find module vue loader lib plugin） JavaScript

一.问题描述
只是一个简单的用到了vuex的小项目，运行npm run dev之后，程序一直报错。报错信息如下：

vuex-learning@1.0.0 dev D:\workspace\LearningWeb\vue-basic\vuex-learning > webpack-dev-server --mode developmentinternal/modules/cjs/loader.js:960 throw err; ^Error: Cannot find module 'vue-loader/lib/plugin' Require stack: - D:\workspace\LearningWeb\vue-basic\vuex-learning\webpack.config.js - D:\workspace\LearningWeb\vue-basic\vuex-learning\node_modules\webpack-cli\bin\utils\convert-argv.js - D:\workspace\LearningWeb\vue-basic\vuex-learning\node_modules\webpack-dev-server\bin\webpack-dev-server.js at Function.Module._resolveFilename (internal/modules/cjs/loader.js:957:15) at Function.Module._load (internal/modules/cjs/loader.js:840:27) at Module.require (internal/modules/cjs/loader.js:1019:19) at require (internal/modules/cjs/helpers.js:77:18) at Object. (D:\workspace\LearningWeb\vue-basic\vuex-learning\webpack.config.js:2:25) at Module._compile (internal/modules/cjs/loader.js:1133:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10) at Module.load (internal/modules/cjs/loader.js:977:32) at Function.Module._load (internal/modules/cjs/loader.js:877:14) at Module.require (internal/modules/cjs/loader.js:1019:19) { code: 'MODULE_NOT_FOUND',

【如何解决（Cannot find module vue loader lib plugin）】package.json文件信息如下：

{ "name": "vuex-learning", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "dev": "webpack-dev-server --mode development" }, "author": "", "license": "ISC", "devDependencies": { "@vue/component-compiler-utils": "^3.1.2", "css-loader": "^3.5.3", "html-webpack-plugin": "^4.3.0", "node-sass": "^4.14.1", "sass-loader": "^8.0.2", "style-loader": "^1.2.1", "vue": "^2.6.10", "vue-loader": "^15.7.0", "vue-template-compiler": "^2.6.10", "vuex": "^3.4.0", "webpack": "^4.43.0", "webpack-cli": "^3.3.11", "webpack-dev-server": "^3.11.0" } }

二.解决方法
根据报错信息，不能找到’vue-loader/lib/plugin’这个模块。可是已经安装了vue-loader, 并且查看node_modules文件夹下，确实有这个文件。在排除了程序当中不存在其他错误之后，我做的唯一变化就是安装了vuex这个包。只能是vuex安装，引起了vuex与vue-loader版本不适配的问题引起的。我尝试着去查看了一下 vuex这里面用到的vue-loader版本号，是
“vue-loader”: “^15.2.1”, 所以我将原来的vue-loader卸载，重新安装，结果就不报错了。