The Mahjong Sanctuary game is loading for some players but not for others as evidenced by all the comments in the past few days. Since this is an HTML5 game, it is not failing to load due to the Adobe Flash block issue.
A few possibilities come to mind for this game not loading.
1. It might be due the browser people use which have incompatibility issues with HTML5 (such as Internet Explorer).
2. It might be due to the RAM of 4GB for one's computer, tablet or phone, which sometimes causes problems of not having enough memory to load the games.
3. It might be due to having too many programs open and running while playing the game, which can be corrected by closing programs not needed.
4. It might be due to temporary loss of internet connection, but this is usually not the cause.
For more reading on issues involving HTML5 games, see the Pogo troubleshooting guidance for HTML5 games using the link below.
https://answers.ea.com/t5/Pogo/HTML5-games-troubleshooting/m-p/5761108#M158506