Please, just wait for a little bit, reboot the game and the task should appear.
If you still experience the issue, please contact our support, describe your issue and provide the screenshot which illustrates the issue. We will check and help you ASAP!

We do not recommend completing the tasks at the first and the last minutes of the festival since at this time the server is under the highest workload and, depending on your Internet speed and other factors, data processing may take different time.