We are sorry for the inconvenience caused. If this happens again, please follow the steps below:
1. Check your network connection. A stable connection is essential for the chest to work.
2. Check the storage space of your device to make sure there is sufficient storage space.
3. If all of the above causes are ruled out, please contact a customer service agent and explain whether you are experiencing a situation where the ad cannot be played or the ad is played but you cannot receive the reward. Our developers will optimize the system as soon as possible upon receiving the information to fix the issue.