Hello,
In order to fix that issue, you need to unplug your router (turn it OFF), restart your PC, wait for 5-10 minutes and plug the router back (turn it back ON) and then try again.
If that didn't work, then I recommend you to follow this solution:
Open Windows Date & Time Settings (https://i.imgur.com/Q3aUlQ6.png)
Later, follow these steps:
"Automatic time setting" → ON
"Set time zone automatically" → OFF
Select a time zone (for example, UTC + 01:00)
Restart your computer to test and try again start the game
If your problem still exists after you've done all the steps above, try these:
Try to log-in multiplayer with different router.
Try to log-in multiplayer with the internet of your phone that has android or iOS OS.
Credits : @BL4CK$K1LL
Thank you,
Lukavsky TMP