This article onMiniTool Websitecan be a guide.
For detailed solutions, you’re free to refer to the next part.
To see the server status on different gaming platforms, there are some paths for you.

Step 1: Unplug all hardware from your router and modem.
Step 2: After 30 seconds, plug in the modem and power on it.
Step 3: Wait about 60 seconds until your modem has successfully authenticated with your ISP.

Step 4: Plug in the router and power on it.
The booting process may cost 2 minutes.
When your router and modem reboot successfully, you might verify if the connection lost error has gone.
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Related article:Modem VS Router: What Is the Difference Between Them?
Therefore, you’ve got the option to make an exception for your game.
Step 1: TypeWindows Securityin theStartmenu and open it.
Step 2: Navigate toVirus & threat protectionand underVirus & threat protection options, chooseManage options.
Step 3: Scroll down to chooseAdd or remove exclusionsunderExclusion.
Click Add to add the process as an exclusion.
Then you’re able to try Rocket League again.
The Windows Firewall may prevent your program from dive into the Internet.
This post shows you how to allow a program through Firewall Windows 10.