Unfortunate news for all Vanguard players. Recently, a Twitter post was uploaded notifying all those who are playing Dear Days on the Nintendo and are awaiting the arrival of the DLC that it will be postponed.
According to their main website, the game update engine encountered an error and a major bug and based on their developers, it will take a while for them to resolve this problem.
The release date for the version update for the Switch version after the bug fix will be announced on the official Cardfight!! Vanguard Twitter and the Cardfight!! Vanguard Dear Days website.