I have installed the below versions.
node version : v14.15.1
npm -v: 6.14.8
angular Cli : 11.0.7
need to do:
In a command window (or the Command prompt in VS Code), type npm install.
This creates a node_modules folder and installs all packages from the package.json file into that folder.
In the same command window (or the Command property in VS Code), type npm start.
The application should then compile and launch in your default browser.
Note: kindly change the APP_URL accordingly and make sure that API service is up and running.
const API_URL = "https://localhost:44367/api/";