https://support.xbox.com/en-US/help/errors/error-code-0x82d6…
Microsoft has started to block the use of "unauthorised" game controllers, perhaps in a bid to stop some gamers from using cheat accessories and mouse-to-gamepad emulation hardware such as Cronus Zens, Xim adapters and Gamesirs VX2's. This will prevent gamers from using mouse + KB input methods on games that don't natively support such a function and having too much of a competitive advantage over thumbstick players.
Update: XIM adapters and similar devices are apparently not affected as noted by dexerto [XIM devices use a loophole where an OEM Xbox controller is used to authenticate the XIM device, meaning the Xbox only detects the authentic first-party device and doesn’t block the cheat device at all]. This ban as such might be a move to protect their revenue stream and not a move to ban cheaters, or it could be related to Microsoft's plans to expand its program for approved third-party wireless Xbox controllers.
Microsoft notes:
Microsoft and other licensed Xbox hardware partners' accessories that have been cosmetically modified to change their shape, such as moving input locations, are not impacted.
Note From the moment you connect an unauthorized accessory and receive error code 0x82d60002, you’ll have two weeks to use the accessory, after which time it will then be blocked from use with the console. At that time, you’ll receive error code 0x82d60003. We encourage you to contact the store or manufacturer where you obtained the accessory to get help with returning it.
If you've recently bought any game pads (e.g cheap generic ones imported from Aliexpress), input converters or fighting stick / hitbox that doesn't have a green coloured "Designed for Xbox" seal of approval, there's a strong likelihood that game controller will be blocked by your console (and you should probably return it, if you have no plans to use it on a PC).
So lame