serious bug invisible unmovable character

I shall investigate your account! That's very strange, never heard of anything like this before! Has it only just started happening?

Your character not moving can happen when you don't have a skill bound to your left mouse button - But your character vanishing is new!

I tested this locally, and it seems to just be because you don't have a skill on your left mouse button - Try putting a default attack there, and see if there are any other problems!