Hi, following upgrade to 1.16.3, agents are unable to authenticate with LDAP. I'm seeing the following error.
PHP Fatal error: Uncaught Error: Call to undefined function ldap_connect() in phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/include/Net/LDAP2.php:433
Stack trace:
#0 phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/include/Net/LDAP2.php(339): Net_LDAP2->performConnect()
#1 phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/authentication.php(158): Net_LDAP2->bind()
#2 phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/authentication.php(191): LDAPAuthentication->getConnection()
#3 phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/authentication.php(430): LDAPAuthentication->authenticate()
#4 /var/www/html/osticket/upload/include/class.auth.php(249): StaffLDAPAuthentication->authenticate()
#5 /var/www/html/osticket/upload/scp/login.php(71): AuthenticationBackend::process()\n#6 {main}
thrown in phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/include/Net/LDAP2.php on line 433, referer: https://redacted/scp/login.php
PHP Fatal error: Uncaught Error: Call to undefined function ldap_close() in phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/include/Net/LDAP2.php:701
Stack trace:
#0 /var/www/html/osticket/upload/include/pear/PEAR.php(755): Net_LDAP2->_Net_LDAP2()
#1 [internal function]: _PEAR_call_destructors()\n#2 {main}
thrown in phar:///var/www/html/osticket/upload/include/plugins/auth-ldap.phar/include/Net/LDAP2.php on line 701, referer: https://redacted/scp/login.php
osTicket info page is as follows.

and osTicket is reporting the LDAP plugin version as 0.6.2

Any help would be appreciated.