League of Legends (LoL) Question: Mastery builder down?

I just tested it, to see if this statement is right or not, seemed to work just fine :P

Though, if this keeps continueing, then just look at what possibly went wrong.
These are all the suspects when it comes to working online:
* Your router (that thingy with an antenna)
* Your system (The big boss on your desk)
* The server you use (Mobafire)

Well, for starters, unless it was a temporarily bug, it probably isn't mobafire that is wrong, because I just tested it myself, and it worked fine.
So now we look at the other things;
If the router works... bad, that means that all internet features will go slower or just stop working at all. If this happends, it is probably your router, if not, keep looking ;D

The system can be a culprit for multiple reasons :D
The system contains the mouse (maybe the mouse just failed you for a second), the system can contain virusses, the system can have a bad processor or whatever.
The mouse is easy to check, because if the mouse fails you just once, you can now fill in your masteries ;P
Virusses can be checked with anti-viruss systems.
A bad processor will let things of the system just stop every once in a while (whether online or not)

There are probably still some other things that could cause this, but these are the ones that are in my knowledge zone :P

So first, try to test again if you can build your masteries, if the answer is no, then check your expensive machines :P

I hope I helped :D