An unhandled exception occurred: Port 4200 is already in use. Use '--port' to specify a different port. See "C:\Users\USER1\AppData\Local\Temp\ng-Kv887z\angular-errors.log" for further details. code example

Using your terminal, find the PID of port 4200
netstat -ano | findstr :4200

Kill task by the PID Number (Replace 15940)
taskkill /PID 15940 /F