Error 807A1007 occurs when joining a party on Xbox One
You see the following error code when you try to join a party on Xbox One:
This may mean that the Internet connection between your Xbox console and the other party members is failing. This is usually caused by a connectivity issue between you and the host. Occasionally, it indicates a conflict in the NAT type used by you and the host.
Solution 1: Try to join the party again
This error can be caused by temporary network issues, so just trying to join the party again will often work.
Solution 2: Check to see if you have a Network Address Translation (NAT) issue
To troubleshoot NAT-related issues, you and the others trying to join the party should try the Xbox One Multiplayer Game Solution.
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