Can't access 'All pages' in wp-admin

Hi there,

I just noticed when I wanted to edit one of my pages, that I can’t access my existing pages. I get a blank page in the wp-admin area when I press the ‘all pages’ button. I can press ‘new page’ but preview and saving doesn’t work. Again blank page…

Someone knows what going on and how to fix it? Probably something broken in one of the ftp files right?

Thanks a lot in advance!