Flowery chest cant open

[Bintrack]

Hello im Crusader lvl 45 and Flowery chest said for player lvl 30 and above who completed basic selection before second advancement

https://gyazo.com/ce8ea62e68c4cad19e9d151b06feaf27

I wouldt use it any more?

 

[Zankza]

As the box says, you cannot use it if you've changed into second class.