The ERROR TypeError: Class extends the value undefined is not a constructor or null
TypeError: Class extends the value undefined is not a constructor or null
At the Object. & lt; anonymous> (C: \ Users who are interested \ Desktop \ \ easy demo5/node_modules/mini - CSS - extract - the plugin \ dist \ CssDependency js: 31)
At the Module. _compile (internal/modules/CJS/loader. Js: 1137:30)
at Object.Module._extensions.. Js (internal/modules/CJS/loader. Js: 1157:10)
At the Module. The load (internal/modules/CJS/loader. Js: 985:32)
Ats Function. The Module. _load (internal/modules/CJS/loader. Js: 878:14)
At the Module. The require (internal/modules/CJS/loader. Js: 1025:19)
At the require (internal/modules/CJS/helpers. Js: 72:18)
At the Object. & lt; anonymous> (C: \ Users who are interested \ Desktop \ \ easy demo5/node_modules/mini - CSS - extract - the plugin \ dist \ index js: 12:45)
At the Module. _compile (internal/modules/CJS/loader. Js: 1137:30)
at Object.Module._extensions.. Js (internal/modules/CJS/loader. Js: 1157:10)
At the Module. The load (internal/modules/CJS/loader. Js: 985:32)
Ats Function. The Module. _load (internal/modules/CJS/loader. Js: 878:14)
At the Module. The require (internal/modules/CJS/loader. Js: 1025:19)
At the Object. & lt; anonymous> (C: \ Users who are interested \ Desktop \ \ easy demo5/node_modules/mini - CSS - extract - the plugin \ dist \ CJS js: 3:18)
At the Module. _compile (internal/modules/CJS/loader. Js: 1137:30)
npm ERR! Code ELIFECYCLE
npm ERR! Errno 1
npm ERR! [email protected] build: test: ` vue cli - service build - mode test `
npm ERR! The Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build: the test script.
npm ERR! This is probably not a problem with NPM. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C: \ Users \ easy aspiring \ AppData \ Roaming \ NPM - cache \ _logs \ 2020-12-09 T12_39_38_190Z - the debug log


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