Guild Wars 2

Gw2 errorscreen popped when I went to our WvW borderlands <Ring of Fire>

Saying that a serious error has occired that preventes the program from continuing to run. Thing is, if I hide that window, I can keep on playing…

I have to do a workaround change to window and back to fullscreen in order to hide it, but have now been playing for a while ignoring that error. Is it good/bad.. and error system is not working??