Angular 11 postinstal script error(solution)

[DartWelder]

just replace in your ng-app-add-loader.js:
const commonCliConfig = 'node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/common.js';
with:
const commonCliConfig = 'node_modules/@angular-devkit/build-angular/src/webpack/configs/common.js';

const typescriptCliConfig = 'node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/typescript.js';
with:
const typescriptCliConfig = 'node_modules/@angular-devkit/build-angular/src/webpack/configs/typescript.js';