Compilation error after upgrading Angular 7 to 13

[kissy0205]

Hi,

I've followed this official document to upgrade my Angular v.7.x to v13.x. Successfully updated. but when doing ng serve, getting below issues. I don't understand the problem even after going through some technical documentation. I need someone to help me on this

ERROR - 1

Generating browser application bundles (phase: setup)...(node:8132) UnhandledPromiseRejectionWarning:
Error: The target entry-point "@this-is-custom-library/built-with-older-angular-version" has missing dependencies:

• @angular/forms/src/directives/control_value_accessor
• @angular/core/src/type

tsConfig.json

{
  "extends": "./node_modules/@this-is-custom-library/built-with-older-angular-version/config/tsconfig.base",
  "compilerOptions": {
    "importHelpers": true,
    "outDir": "dist",
    "strictPropertyInitialization": false,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "module": "es2015",
    "baseUrl": "src",
    "skipLibCheck": true
  },
  "angularCompilerOptions": {
    "preserveWhitespaces": "true"
  },
}

when i remove the "extends": "./node_modules/@this-is-custom-library/built-with-older-angular-version/config/tsconfig.base", from tsConfig.json, its compiled and throwing some other error like below.

ERROR- 2

 src/app/appComponent.ts:2:58 - error TS2792: Cannot find module '@angular/router'. Did you mean to set the 'moduleResolution' option to 'node', 
 or to add aliases to the 'paths' option?
2 import { ActivatedRoute, NavigationExtras, Router } from '@angular/router';

Could someone please help me to understand the issue and share solution for fixing issues?

Thanks Team
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[alan-agius4]

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