I try to configure LDAP Authentication and Lookup as in the image attached.At the top of the page i can reed LDAP configuration updated successfullybut in LDAP server section there is an error: Unable to find LDAP servers for this domain. Try giving an address of one of the DNS servers or manually specify the LDAP servers for this domain below.the error log show this message. PHP Fatal error: Call to a member function bind() on a non-object in phar:///var/www/html/support/include/plugins/auth-ldap.phar/authentication.php on line 170, referer: http://172.16.4.77/support/scp/staff.php?a=add PHP Fatal error: Call to a member function bind() on a non-object in phar:///var/www/html/support/include/plugins/auth-ldap.phar/authentication.php on line 220, referer: http://172.16.4.77/support/scp/Installation detail:osTicket1.9.5.1 LDAP and Active Directory Plugin v.0.6.2Can you help me to solve this problem?Thank you