Challenges from Susanoo

Uhhh... is it just me who cant accept challenges? Or is it not available cause of the event going on right now?
http://onigiri.cyberstep.com/_/forum/
http://onigiri.cyberstep.com/_/forum/viewtopic.php?f=10&t=4890
Chuubert wrote:Uhhh... is it just me who cant accept challenges? Or is it not available cause of the event going on right now?