[Update]: 6/30 (Wed), 17:45 (UTC-8)
We have received confirmation from Google that the issue has been resolved.
If you face any further issues, please see below:
About Ad Videos
Due to a problem with Google, we have confirmed that there is an issue that prevents players from viewing video ads on Android devices.
We will post additional updates when Google confirms that the issue has been resolved.
Thank you for playing Puzzle & Dragons, and we apologize for any inconvenience this may cause.