JEECG-BOOT build 报错
"F:\Program Files\nodejs\node.exe" "F:\Program Files\Yarn\bin\yarn.js" run buildyarn run v1.21.1
$ vue-cli-service build
-Building for production... ERRORTypeError: 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
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