Board Thread:Questions and Answers/@comment-26571587-20150906055928

When I first finished the Stage 1 of the War Training Expansion Event, I got an item but couldn't claim it. I replayed the same stage to see if it was just an error, but even after beating the boss twice, I couldn't claim my first nor second prize. When I try to, this comes out.

What does it say and how can I fix it?

Thank you! 