Ao iniciar pelo npm start, dá este erro.
./src/polyfills.ts - Error: Module build failed (from ./node_modules/@ngtools/webpack/src/ivy/index.js): TypeError: The 'compilation' argument must be an instance of Compilation at getCompilationHooks (C:\sistemas\angular\Kcms.Erp.Web\node_modules\webpack\lib\javascript\JavascriptModulesPlugin.js:125:10) at C:\sistemas\angular\Kcms.Erp.Web\node_modules\webpack\lib\javascript\CommonJsChunkFormatPlugin.js:43:19 at Hook.eval [as call] (eval at create (C:\sistemas\angular\Kcms.Erp.Web\node_modules\tapable\lib\HookCodeFactory.js:19:10), <anonymous>:5:1) at Hook.CALL_DELEGATE [as _call] (C:\sistemas\angular\Kcms.Erp.Web\node_modules\tapable\lib\Hook.js:14:14) at Compiler.newCompilation (C:\sistemas\angular\Kcms.Erp.Web\node_modules\@angular-devkit\build-angular\node_modules\webpack\lib\Compiler.js:1030:30) at C:\sistemas\angular\Kcms.Erp.Web\node_modules\@angular-devkit\build-angular\node_modules\webpack\lib\Compiler.js:1073:29 at Hook.eval [as callAsync] (eval at create (C:\sistemas\angular\Kcms.Erp.Web\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:13:1) at Hook.CALL_ASYNC_DELEGATE [as _callAsync] (C:\sistemas\angular\Kcms.Erp.Web\node_modules\tapable\lib\Hook.js:18:14) at Compiler.compile (C:\sistemas\angular\Kcms.Erp.Web\node_modules\@angular-devkit\build-angular\node_modules\webpack\lib\Compiler.js:1068:28) at Compiler.runAsChild (C:\sistemas\angular\Kcms.Erp.Web\node_modules\@angular-devkit\build-angular\node_modules\webpack\lib\Compiler.js:520:8)
O que pode ser este erro ?