To fix this you need add your machine name in the /etc/hosts file to point to localhost(127.0.0.1).
You can find your machine name by running the following command:
$ hostname
macbook-pro
From the output above you know your hostname is “macbook-pro”.
Edit “/etc/hosts” file and add that name at the end of line that lists 127.0.0.1
127.0.0.1 localhost macbook-pro
Save the file.
Now you IntelliJ should be able to start your server.