If your game time or date is out of sync with the server time, you can run into issues. For example:

• Not seeing the current Event Mine
• Not seeing Daily Deals
• Waiting a long time for Barriers to unlock
• Not being able to play events like the Chrono Mine

To fix this, you need to make sure your device's time/date settings are "automatic", and correct. 

On Android devices:

1. Open your phone's "Clock" app
2. Tap "More"
3. Open "Settings"
4. Tap "Change date & time"
5. Select "Set time zone automatically"

On iOS devices:

1.  Go to "Settings"
2. Tap "General"
3. Tap "Date & Time"
4. Select "Set Automatically"

If the problems in your game persist, please be patient. The effects of incorrect time/date can persist after you have updated your device settings.