This is [Hero Cantare] CM Liddie!
We would like to notify a known issue after the maintenance on November 21st PST.
● An issue where an error message appeared in a specific situation when receiving rewards from the [Returner's Path Mission].
# The reward could be claimed without any problem.
# The issue has been addressed and has been delivered to our developer team.
We are sorry for your inconvenience and thank you for your understanding.
Hero Cantare Team