As it turns out, there are multiple different causes that will ultimately spawn this error code:

Method 1: Restart the Game

As it turns out, Destiny 2 has a tendency of triggering weird errors whenever you spend too much time in the menus idling. This problem is also encountered on consoles (Ps4 and Xbox One) but it’s way more frequent on PC. Several affected users struggling with the same problem have confirmed that they managed to fix this problem by restarting the game in order to force the engine to reinitialize everything. If this scenario is applicable, restart the game conventionally (by closing Destiny 2 and opening it up again) and see if the problem is resolved. You can do this on consoles too, but make sure to close the game completely rather than exiting the dashboard and putting the game in the background. If restarting the game didn’t work for you, move down to the next potential fix below.

Method 2: Restarting and Resetting your Router

If a simple restart of the game didn’t work, the next step should be to turn your attention towards a network inconsistency. In case you’re using a router with limited bandwidth and you have more than 3-4 devices connected to your home network, it’s possible that a network inconsistency is causing the game servers to terminate your connection – this is most likely the result of a data flood that your router can’t handle. In this case, you should start with a simple router restart. This procedure allows your computer to refresh the Internet connection and allocate new TCP / IP values which will eliminate the majority of superficial issues. To perform a simple router reboot, either press the power button on the pack or physically unplug the power cable from the power outlet and wait for a full minute to ensure that te power capacitors are completely drained. If the issue is still not resolved, you should consider going for a router reset. But keep in mind that this operation will reset any custom credentials you might have previously established for your router settings and essentially return your router settings to their factory state. This means that any forwarded ports, booked devices, and whitelisted entities will also be forgotten. If you want to go for a router reset, use a sharp object (like a small screwdriver or a toothpick) to reach the reset button on the back of your router. Once you are able to reach it, press it and keep it pressed for about 10 seconds or until you see the front LEDs all flashing at the same time. Once you see this behavior, wait for the internet connection to be established. Depending on your ISP, you might need to validate your ISP credentials once again. After Internet access is back, open up Destiny 2 again and see if the Lettuce error code is resolved. In case the same problem is still appearing, move down to the next potential fix below.

Method 3: Uninstalling GameFirst (If applicable)

If you’re using an ASUS computer (or at least an ASUS motherboard, it’s possible that you’re seeing the ‘lettuce’ error due to a software conflict between destiny 2 and GameFirst (proprietary ASUS program). GameFirst is a service offering easy a wide range of free-to-play multiplayer games for PC users. Unfortunately, it also tends to conflict with Destiny 2. If this scenario is applicable and you have the GameFirst program installed on your computer, you should be able to resolve the problem by uninstalling the game. This fix was confirmed to work by a lot of affected users encountering the same error message. To do this, follow the instructions outlined in the steps below: In case you’re still facing the lettuce error code in Destiny 2m move down to the next potential fix below.

Method 4: Applying the fix for Technicolor and Thomson routers (if applicable)

If you’re using a Thomson or Technicolor router, you’re unfortunate enough to suffer from a bug that’s been around since the Destiny 2 servers first came online in 2017. As it turns out, these router manufacturers are unable to handle automatic port forwarding for Destiny 2 even if UPnP is enabled. If this scenario is applicable, you should be able to resolve the issue by unbinding a series of ports that are being used by Destiny 2 and enabling the Telnet protocol from the Windows Features menu. If this method is compatible with your particular setup (you have a Technicolor or Thomson router), follow the instructions to enforce the fix: Note: Portrange is just a placeholder – Replace it with the range that includes the 3074 port. 

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