npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: vue-antd-jeecg@3.1.0
npm ERR! Found: webpack@4.46.0
npm ERR! node_modules/webpack
npm ERR! dev webpack@“^4.5.0” from the root project
npm ERR! peer webpack@“^3.0.0 || ^4.1.0 || ^5.0.0-0” from vue-loader@15.9.8
npm ERR! node_modules/vue-loader
npm ERR! vue-loader@“^15.7.0” from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer webpack@“^5.0.0” from css-loader@6.7.1
npm ERR! node_modules/css-loader
npm ERR! peer css-loader@“*” from vue-loader@15.9.8
npm ERR! node_modules/vue-loader
npm ERR! vue-loader@“^15.7.0” from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!

解决方法 执行 cnpm i

然后再执行 cnpm install (推荐使用) npm install （太慢了）
后期运行项目 就执行 npm run serve 就可以了