open_basedir
is a PHP option restricting PHP's access to specific directories.
You have the directory /usr/share/php
in your include path without having access to it. Usually, PHP tries all paths in the include_path
one by one. This means that PHP cannot find the file Auth/Yubico.php
in the current directory, so PHP searches in /usr/share/php
next.
Make sure that the file you want to include is actually there. You can also remove /usr/share/php
from your include path (either by editing the php.ini
file, if you have access to it, otherwhise using the ini_set()
method).