adding www. and page is going blank

Hey there,

just have this recently, when I add www. in front of my web-adress it goes completely blank. Added surfarama new version of theme today, might it be because of this? Turned off plu-ins to see if it was because of them, but it´s not that.

It even goes all blank after updating the css, as I still have to change stuff there.

Any idea?

Thanks a lot in advance!