TeamViewer can't connect to the internet

Hi, I have a Retina MacBook Pro 13" late 2013, running macOS Mojave 10.14.1. I have installed the latest version of TeamViewer on it but when I'm opening it it keeps saying it's not ready, check your internet connection and is not showing me an ID or password. I have teamviewer. enabled in the firewall. I have tried a restart and a reinstall of teamviewer but nothing...

I tried with a Windows computer at the same WiFi network and teamviewer works fine, and of course other apps and general internet works fine on the MacBook.

Can you help me please?