4.0 Upgrade Blank Screen

Kane,
– can you access the error-log of your webserver? There should be some infos about what happened.
– is the backend of you install accessable (is at http://YOURDOMAINNAMEHERE/wp-admin/)
– can you try to add define( 'WP_DEBUG', false ); to you wp_config.php and see what’s happening then?

Not my day… sorry… What I meant in the two previous posts:

1. can you access the error-log of your webserver? There should be some infos about what happened.
2. is the backend of you install accessable (is at http://YOURDOMAINNAMEHERE/wp-admin/)?
3. Add define( 'WP_DEBUG', true ); to your wp_config.php. This will create a file debug.log in the root of your website. check this file for additional info.

/wp-admin is available but after typing your login and pressing LogIn the link stays the same (http://yourdomainname/wp-login.php)and the screen is blank