We receive alarming news from Pokémon Sword and Shield. Apparently, the problem related to the magic exchange The game has been developed and it is already known why it is due.
According to what is shared, some users with modified versions of the game are sending malicious Pokémon through this exchange function. This causes the game to crash upon receiving one of these creatures.
If you get one of these Pokémon, your game will be blocked when you try to access the online functions through the Y connection. For this reason, it is recommended to avoid this function for now.
Finally, it has been specified that this lock does not affect save data. What we have not been able to know is how long the blockage lasts. We will be attentive to more details, including the release of a patch that solves this situation.