This article is for Minecraft: Java Edition. If you're experiencing connection issues on Minecraft Realms for mobile, Xbox One, Nintendo Switch, VR, or Windows 10, go here.
Realms connection speeds can vary between individual players, computers, and networks. If you encounter connection or timeout errors in Realms, there are a number of things that you can do to attempt to resolve the issue:
- If using a wireless connection, ensure that you have a stable connection to your router
- Try connecting using an Ethernet cable instead of using Wi-Fi
- Try reverting to a previous backup using the backups list
- Try closing the Realm and re-opening it
- If you have a firewall or antivirus, check the settings to be sure that it is not blocking or slowing your connection
- Check your currently-running programs for anything that is using your internet bandwidth, then close those programs
- Switch world slot and load a new world
To allow access to Minecraft realms through your firewall, the ports that need to be open are 26000-28000 and port 80 and 443 without destructive proxies. This should be enough, and no server IP or hostname is needed.
Realms services are automatically set to a physical location nearest the Realm owner's IP. If for example, you live in the US, but the Realm you're connecting to is based in Australia, you may have a slightly lower connection speed than the owner of the Realm.
Some Internet service providers may limit connections to Azure, where Realms and many other popular web services are hosted. To find out more, contact your internet service provider.
Invalid session ID
This error can easily be fixed by logging out of the game and back in to refresh your session ID. This also applies to the same error being displayed when starting the game.
If you have another technical issue with your Realm, please contact customer support, shortly describe the issue, provide the name of the Realm, and your Minecraft username.