Webpack Broken after installing vuex-persistedstate - node.js

Question

I have broken my webpack installation after installing vuex-persistedstate. I have removed the node modules folder and the package-lock.json file and re-installed, but I am still receiving the following error when trying to run my project:
npm ERR! client#1.0.0 dev: `webpack-dev-server --inline --progress --config build/webpack.dev.conf.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the client#1.0.0 dev script.
I have deleted the /node_modules folder and package-lock.json file, and ran the following commands:
npm install
npm run build
npm start
My package.json file contains the following packages:
"scripts": {
"dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
"start": "npm run dev",
"unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run",
"e2e": "node test/e2e/runner.js",
"test": "npm run unit && npm run e2e",
"lint": "eslint --ext .js,.vue src test/unit test/e2e/specs",
"build": "node build/build.js"
},
"dependencies": {
"ajv": "^6.10.2",
"axios": "^0.19.0",
"babel-polyfill": "^6.26.0",
"bootstrap": "^4.3.1",
"bootstrap-vue": "^2.0.0",
"jquery": "^3.5.1",
"popper.js": "^1.15.0",
"vue": "^2.5.2",
"vue-cookies": "^1.5.13",
"vue-js-modal": "^1.3.31",
"vue-router": "^3.0.1",
"vuejs-dialog": "^1.4.1",
"vuex": "^3.5.1",
"vuex-persistedstate": "^3.0.1",
"web3": "^1.2.1"
},
"devDependencies": {
"#types/node": "^12.7.5",
"autoprefixer": "^7.1.2",
"babel-core": "^6.22.1",
"babel-eslint": "^8.2.1",
"babel-helper-vue-jsx-merge-props": "^2.0.3",
"babel-loader": "^7.1.1",
"babel-plugin-istanbul": "^5.2.0",
"babel-plugin-syntax-jsx": "^6.18.0",
"babel-plugin-transform-runtime": "^6.22.0",
"babel-plugin-transform-vue-jsx": "^3.5.0",
"babel-preset-env": "^1.3.2",
"babel-preset-stage-2": "^6.22.0",
"babel-register": "^6.22.0",
"chai": "^4.1.2",
"chalk": "^2.0.1",
"chromedriver": "^2.27.2",
"copy-webpack-plugin": "^6.0.3",
"cross-env": "^5.0.1",
"cross-spawn": "^5.0.1",
"css-loader": "^3.1.0",
"eslint": "^4.15.0",
"eslint-config-standard": "^10.2.1",
"eslint-friendly-formatter": "^3.0.0",
"eslint-loader": "^1.7.1",
"eslint-plugin-import": "^2.7.0",
"eslint-plugin-node": "^5.2.0",
"eslint-plugin-promise": "^3.4.0",
"eslint-plugin-standard": "^3.0.1",
"eslint-plugin-vue": "^4.0.0",
"extract-text-webpack-plugin": "^3.0.0",
"file-loader": "^1.1.4",
"friendly-errors-webpack-plugin": "^1.6.1",
"html-webpack-plugin": "^2.30.1",
"inject-loader": "^3.0.0",
"karma": "^5.1.1",
"karma-coverage": "^2.0.3",
"karma-mocha": "^2.0.1",
"karma-phantomjs-launcher": "^1.0.2",
"karma-phantomjs-shim": "^1.4.0",
"karma-sinon-chai": "^1.3.1",
"karma-sourcemap-loader": "^0.3.7",
"karma-spec-reporter": "0.0.31",
"karma-webpack": "^2.0.2",
"mini-css-extract-plugin": "^0.8.0",
"mocha": "^8.0.1",
"nightwatch": "^1.3.7",
"node-notifier": "^5.1.2",
"optimize-css-assets-webpack-plugin": "^3.2.0",
"ora": "^1.2.0",
"phantomjs-prebuilt": "^2.1.14",
"portfinder": "^1.0.13",
"postcss-import": "^11.0.0",
"postcss-loader": "^2.0.8",
"postcss-url": "^7.2.1",
"rimraf": "^2.6.0",
"selenium-server": "^3.0.1",
"semver": "^5.3.0",
"shelljs": "^0.7.6",
"sinon": "^4.0.0",
"sinon-chai": "^2.8.0",
"style-loader": "^1.0.0",
"uglifyjs-webpack-plugin": "^1.1.1",
"url-loader": "^2.1.0",
"vue-loader": "^13.3.0",
"vue-style-loader": "^3.0.1",
"vue-template-compiler": "^2.5.2",
"webpack": "^4.44.0",
"webpack-bundle-analyzer": "^3.3.2",
"webpack-cli": "^3.3.8",
"webpack-dev-server": "^3.11.0",
"webpack-merge": "^4.1.0"
},
"engines": {
"node": ">= 6.0.0",
"npm": ">= 3.0.0"
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
]