Thanks for the bugreport and screenshots IZY.
This bug seems to be caused by a bug in Safari. So perhaps we should create a bugreport to Apple?
Searching for "A problem occurred with this webpage so it was reloaded" with Google reveals that many other
people are having similar problems with Safari on other websites.
Could you please try to clear your browser cache, then try to save the game again?
Also, does this crash happen only on a specific game, or does the browser crash even on newly created games?
I just tried to save on Safari on iOS 8.1 on the iPhone 5, and it worked correctly for me there.
Here's someone else having the same problem:https://discussions.apple.com/thread/5559229