JEECG-BOOT build 报错

604693119

"F:\Program Files\nodejs\node.exe" "F:\Program Files\Yarn\bin\yarn.js" run build
yarn run v1.21.1
$ 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:\workspace\web\idea\abbsys\jhd-ui\node_modules\mini-css-extract-plugin\dist\CssDependency.js:12:46)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
    at Module.load (internal/modules/cjs/loader.js:815:32)
    at Function.Module._load (internal/modules/cjs/loader.js:727:14)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (D:\workspace\web\idea\abbsys\jhd-ui\node_modules\mini-css-extract-plugin\dist\index.js:12:45)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

进程已结束，退出代码 1