An unhandled exception occurred: Port 4200 is already in use. Use '--port' to specify a different port. See "/private/var/folders/0c/rw7hd8kd5g5545_xnb0ydbs00000gn/T/ng-gJmMmA/angular-errors.log" for further details. code example

sudo lsof -t -i tcp:4200 | xargs kill -9