If you’ve reset your router, and it won’t connect to the internet, there are some quick fixes you can try. First things first, did you actually reset the router or simply restart it?

So if you are facing the “failed to connect to server error”, you should check their social media, reboot the game and your router, turn off crossplay, verify the integrity of the game cache ...

Not being able to connect to games is one of the worst things you can face in Ready or Not. While developers may eventually work on the issue, it’s unclear when the permanent fix will arrive.