Capabilities don’t add

This line in your wpo_add_caps() function is incorrect:

$admin->add_cap( 'administrator', $admin_cap );

It should simply read:

$admin->add_cap( $admin_cap );

Source: WP_Role::add_cap().

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)