Same problem is occuring with my installation.
I have made sure the absolute path is defined in the config file and it is.
Also have made sure upgrade-functions.php and admin-functions.php are uploaded and they are.
Very confused… help would be appreciated. Output:
Warning: main(ABSPATH/wp-admin/admin-functions.php): failed to open stream: No such file or directory in /home/soccerhu/public_html/wp-admin/upgrade-functions.php on line 3
Fatal error: main(): Failed opening required ‘ABSPATH/wp-admin/admin-functions.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/soccerhu/public_html/wp-admin/upgrade-functions.php on line 3