Error message when building with latest version of angular

``Hello, I tried adding builder to my angular app. When trying to add it to an angular 12 app I run into dependency issues. So, instead I already downgraded my angular version to angular 8. However, when starting my app I run into the following error:

./node_modules/@builder.io/angular/__ivy_ngcc__/fesm2015/builder.io-angular.js:981:44-72 - Error: Module not found: 
Error: Can't resolve '@angular/elements' in 'C:\Users\Daniël Verloop\Documents\GitHub\builder-test-app\node_modules\@builder.io\angular\__ivy_ngcc__\fesm2015'

Error: node_modules/@builder.io/angular/app/modules/builder/services/builder.service.d.ts:3:35 - error TS7016: Could not find a declaration file for module 'express'. 'C:/Users/Daniël Verloop/Documents/GitHub/builder-test-app/node_modules/express/index.js' implicitly has an 'any' type.
  
Try `npm i --save-dev @types/express` if it exists or add a new declaration (.d.ts) file containing `declare module 'express';`

import { Request, Response } from 'express';

So, I tried the suggested command, but then the same dependency issues of Angular 12 appear again, and the first error also persists. What did I do wrong?

Angular 12 dependency issues when installing on a newly created Angular app:

npm WARN deprecated @nguniversal/module-map-ngfactory-loader@8.2.6: The string form of `loadChildren` is deprecated, this package is part of its implementation and is no longer needed if not using string form lazy loading. 
See: https://angular.io/api/router/LoadChildren for more details.
npm WARN ajv-keywords@3.5.2 requires a peer of ajv@^6.9.1 but none is installed. You must install peer dependencies yourself.
npm WARN @builder.io/angular@2.0.1 requires a peer of @angular/elements@^8.1.1 but none is installed. You must install peer dependencies yourself.
npm WARN @builder.io/angular@2.0.1 requires a peer of @angular/platform-server@>= 2 but none is installed. You must install peer dependencies yourself.
npm WARN @builder.io/angular@2.0.1 requires a peer of @angular/cli@8.3.22 but none is installed. You must install peer dependencies yourself.
npm WARN @builder.io/angular@2.0.1 requires a peer of tslib@^1.10.0 but none is installed. You must install peer dependencies yourself.
npm WARN @builder.io/angular@2.0.1 requires a peer of zone.js@~0.9.1 but none is installed. You must install peer dependencies yourself.
npm WARN @nguniversal/module-map-ngfactory-loader@8.2.6 requires a peer of @angular/common@^8.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN @nguniversal/module-map-ngfactory-loader@8.2.6 requires a peer of @angular/core@^8.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN @nguniversal/module-map-ngfactory-loader@8.2.6 requires a peer of @angular/platform-server@^8.2.0 but none is installed. You must install peer dependencies yourself.
npm WARN @nguniversal/express-engine@12.1.1 requires a peer of @angular/platform-server@^12.2.7 but none is installed. You must install peer dependencies yourself.

[DMZakaria]

In my case installing angular elements fixed the issue npm i --save @angular/elements

[shyam-builder]

@manandkumaar , I tried with your repo. The issue seems to be the @ng-bootstrap/ng-bootstrap dependency. Upping it to 13.0.0-beta.1 which is the recommended version with Angular 14 seemed to allow npm i for me to work. Can you check?