@pippa605Uk, @Moogan1201 , My review of the loading failures at Mahjong Garden HD found that 2 people of 29 people reported this 85% failure using Windows 10. And 2 of 29 reported this problem for Windows 8.
See my "Review of Mahjong Garden HD loading failures" report under Comment #48 on page 5 of this thread. I updated it on 1/29/20 to include information from both of you to include the browsers she used (Firefox, Chrome, Edge, and the operating system (Windows 8.1).
Also, I know that Edge failed to load the game for you pippa605, but others are having success with it. However, there is only some evidence that Edge works better than other browsers for this type of failure. So there is probably some other cause unrelated to browser used that is causing this failure for you.