newTree.optimize is not a function

[parshavshah]

My package.json file

  "name": "testapp",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular-devkit/core": "^11.2.9",
    "@angular-devkit/schematics": "^11.2.9",
    "@angular/animations": "~11.2.9",
    "@angular/common": "~11.2.9",
    "@angular/compiler": "~11.2.9",
    "@angular/core": "~11.2.9",
    "@angular/forms": "~11.2.9",
    "@angular/platform-browser": "~11.2.9",
    "@angular/platform-browser-dynamic": "~11.2.9",
    "@angular/router": "~11.2.9",
    "@ng-toolkit/universal": "^1.1.21",
    "@schematics/angular": "^11.2.9",
    "rxjs": "~6.6.0",
    "tslib": "^2.0.0",
    "zone.js": "~0.11.3"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.1102.8",
    "@angular/cli": "~11.2.8",
    "@angular/compiler-cli": "~11.2.9",
    "@types/jasmine": "~3.6.0",
    "@types/node": "^12.11.1",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.6.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~6.1.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage": "~2.0.3",
    "karma-jasmine": "~4.0.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~4.1.5"
  }
}

I am getting error while installing @ng-toolkit/universal via ng add @ng-toolkit/universal command

[bruteF04C3]

Hey, the library is not yet upgraded to work with angular 9+ versions, and chances are it will not be in the near future. Read #826 for more information.
Thanks!