Please, make sure you've reached the first breach. If you have, try one of these options:
Check your Internet connection;
- If your Internet connection is fine, restart Steam;
- If that doesn't solve the issue, restart your computer;
- If that doesn't help, try loading this page. If it doesn't load, it means that your Firewall is blocking the connection. Disable your Firewall and try again;
- Try adding the game to your antivirus software exceptions or turning the software off completely. Some software like Kaspersky can prevent the game from connecting to the servers.