For Honor is no stranger to various quirks and quibbles of technical nature, but one of the most pervasive errors that players have been coming across ever since the days of beta is the dreaded 'Matchmaking not ready' error.
For Honor matchmaking not ready is a problem that - for all intents and purposes - freezes your game and makes you unable to interact with the vast majority of gameplay options that For Honor offers, as it is an online game first and foremost.
For Honor error 000200106 is the in-engine reference for this error, and the most surprising thing about 'matchmaking not ready' is that Ubisoft don't seem to be able to fix the thing at all - if there's anything to fix, that is.
Chances are that you've come across 000200106 when attempting to use one of For Honor's numerous matchmaking mechanics, understandably, and what happens when the red screen pops up is that you can't engage in any sort of matchmaking at all. This does not seem to be an issue with game servers, or with your own Internet connection, but rather one related to their communication.
Once you get error 000200106 you can, in most cases, still play 1v1 matches against AI bots, though virtually everything else will be made unavailable until you restart the game. Restarting seems to resolve the problem in most instances, so there's silver lining after all.