ERROR CODE: LETTUCE
Errors of this nature are actively monitored by Bungie to keep us aware of trending issues impacting players. Often these types of issues transpire when interruptions between host and client connections are caused due to circumstances outside of our network.
This can be the result of ISP issues, packet loss, complications with various network hardware, Wi-Fi glitches and other impacting variables to general connection stability. We recommend as a first step that players ensure their current connection is working as intended to remove any outside variables.
If this issue still persists we recommended utilizing the steps described in our Network Troubleshooting Guide to find best practices in resolving these issues.