MLB The Show 22 has a variety of game modes, one of which is Co-Op, an online multiplayer feature that allows for 2v2 and 3v3 matches to be played. However, every once in a while, an error message can pop up, and it can lead to the mode failing to launch. There are, of course, a few ways you can fix this issue.
More often than not, the problem will sit with the servers themselves. If you receive the error message, then the first thing to do is check whether or not the servers are down. You can do this on Downdetector, an online tool that gives you the latest updates on MLB The Show 22. If this is the case, then all you can do is wait until MLB fixes the issue. Chances are, it's down for maintenance.
If, however, the fault doesn't sit with the servers, then it could mean your connection isn't strong enough. To counter this, try using a wired connection, as this will increase the speed. You can also perform a hard reset on your router. By turning it off completely and leaving it for 10 minutes before reactivating, your problem may be solved.
If the problem persists, then you will need to Report an Issue via the game's official FAQ section. Doing so will make the developer aware of your issue, which may lead to a patch or solution.
For more MLB The Show 22 content, check out How to Unlock April Monthly Awards Stage 2 in MLB The Show 22 right here on Pro Game Guides.