none of this worked for me..
It was working fine for me as I had 4.2.3, then I chose to upgrade to 4.3.1 and all of a sudden I could not access the text or visual portions of WordPress anymore. I tried accessing it from three different machines and three different browsers.. I also edited the permissions on the WP-Content and WP-Includes folders from within the web disk… nada.. This is still a problem!