strange error

[cas]

So I have this code:

Code: Select all

<?php
auth_reauthenticate();
access_ensure_global_level( config_get( 'manage_plugin_threshold' ) );
layout_page_header( 'Clone Project' );
layout_page_begin( 'config_page.php' );
print_manage_menu();
?>

Often used in a similar way which works all the way.
Now I get this error:
Who has a clue or am i missing the obvious?