It may be the IP for the game is blocked by the network. I am curious if this is a personal home computer or one in a work environment? To provide better feedback we need more info. What is your current system? How is the network set up?
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This issue might have occurred due to anti-virus software installed, Windows Firewall etc. Try the below troubleshooting steps and check if it helps
Step 1: I suggest you to disable anti-virus software.
NOTE: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.
If the issue still persist, try to uninstall the third party anti-virus software.
Step 2: I suggest you to turn off Windows Firewall.
Follow the below steps:
Refer: Turn Windows Firewall on or off
Hope it helps. Get back to us with an updated status of this issue for further assistance.