Hi, I was working on a website and the pages suddenly went missing. They just display a blank page. Nothing happened to the pages and posts in the admin panel.
I tried deactivating all plugins, no change
Tried switching themes, pages still not displaying
I followed Samuel B's advice on this post: http://wordpress.org/support/topic/all-links-broken-when-use-permalinks?replies=4
And after I deleted the .htaccess file and set the permalinks to /%postname%/ my posts came back. But then perhaps a half hour later they disappeared again.
Why do my pages keep disappearing and how can I make them stay permanently?