前端打包报错

jun503380

yarn run v1.22.4
$ vue-cli-service build

-  Building for production... ERROR  TypeError: Class extends value undefined is not a constructor or null
TypeError: Class extends value undefined is not a constructor or null
    at Object.<anonymous> (D:\java_idea\pz_project\my-jeecg-boot\ant-design-vue\node_modules\mini-css-extract-plugin\dist\CssDependency.js:12:46)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at Object.<anonymous> (D:\java_idea\pz_project\my-jeecg-boot\ant-design-vue\node_modules\mini-css-extract-plugin\dist\index.js:12:45)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Process finished with exit code 1

admin_jh9

依赖删除，重新打包，build