I’ve noticed this error pop up to many other players when they apply to a faction and theyr request is accepted, if that happens simply quit the faction and reload the pae to fix it.
So, in short, do not hit the “ok” button when the “getname error” message appears, but instead go under faction and hit the quit button, probably will show up another error message, and then reload the page, the Error should be fixed.
That happened to me as well just a day ago and tried anything (reset, close/open browser, change browser, unistal and reinstal flash player) until I found the right soluction. Hope that can be useful to other and let them save both time and fun. Cheers.