This bug has been brought to our attention and we are sorry for the inconvenience it may have caused you. Our development team will thoroughly investigate this matter. There is a work around that will allow you to complete this quest and I encourage you to try asking other Summoners in-game or use the forums to get the answer you need.

Unfortunately, I cannot guarantee that a direct response regarding this issue will be posted on this thread, but I do recommend checking Here or Here for any details regarding the development team's investigation.