It has come to our attention that if there is an attempt to use a Sub Attribute on a
card from the 5 Days of Happiness Event, there will be an error notification that
would prevent the action.
We would like to inform our dear users that this is not a bug and is completely
normal that the event does not allow change attribute.
We apologize for the inconvenience if this may cause some confusion. Thank you
for your understanding and continued support!
[NA & EU Servers] Connection Issue
[Completed] Weekly Server Maintenance: 10.11.2022