Advanced Editor not loading for Pages

Hi,

When I try to load a page for editing it won’t load any content, it just shows the “loading” symbol.

I’m not sure what could have caused this, I was just editing a page when this happened. Now it appears that all pages show this “loading” symbol. I’ve tried logging on in chrome safari and firefox and get the same error.

Whats strange is if I log in using a different account it works fine. But with this main account this error keeps happening.

Thanks