redmi note 12 4g can't be unlocked

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HelloI enable all the settings needed to unlock my phone, enable dev options, unlock OEM, enable debug with USB, creating my xiaomi account... But my phone is still locked ! When I try to unlock it on "status of mi unlock", it just says "could not add. Please go to mi community" (I disabled the wifi and use mobile data)Idk what to do now... Can someone help me please ?Btw, sorry for my very bad english, it's not my native language