So this happened at the Sakura's Gift event: I receive the "Do you know where is Sasuke" mission but when I click on "Let's training together (0/1)", the battle icon above my main flashed a bit and "Error in fight request" popped up. Am I supposed to search through the map for Sasuke, fight him, then come back or is this a bug?

Edit: Just noticed that the post above mine is having the same problem. Added screenshot.