Cannot connect to LDAP server

[bharu295]

Team , When i try to configure LDAP with below parameters i am getting errro .

Error :- [2025-03-25T18:56:24.149+0000] {override.py:2048} ERROR - {'result': -1, 'desc': "Can't contact LDAP server", 'ctrls': [], 'info': '(unknown error code)'}

webserver_config.py values

from airflow import configuration as conf
from flask_appbuilder.security.manager import AUTH_LDAP
AUTH_TYPE = AUTH_LDAP
AUTH_LDAP_SERVER = "ldaps://xxx.com:636"
AUTH_LDAP_USE_TLS = False
AUTH_USER_REGISTRATION = True
AUTH_USER_REGISTRATION_ROLE = "Public"
AUTH_LDAP_FIRSTNAME_FIELD = "givenName"
AUTH_LDAP_LASTNAME_FIELD = "sn"
AUTH_LDAP_EMAIL_FIELD = "mail"
AUTH_LDAP_SEARCH = "OU=Service Accounts,OU=,DC=,DC=,DC=" # the LDAP search base
AUTH_LDAP_UID_FIELD = "sAMAccountName" # the username field
AUTH_LDAP_BIND_USER = "CN=,OU=Service Accounts,OU=,DC=,DC=,DC=" # the special bind username for search
AUTH_LDAP_BIND_PASSWORD = "cccc" # the special bind password for search
AUTH_ROLES_MAPPING = {
"CN=,OU=groups,OU=,OU=CCI,DC=,DC=,DC=com": ["User"],
"CN=,OU=groups,OU=,OU=CCI,DC=,DC=,DC=com": ["Admin"],
}
AUTH_LDAP_GROUP_FIELD = "memberOf"
AUTH_ROLES_SYNC_AT_LOGIN = True
PERMANENT_SESSION_LIFETIME = 1800

There is no firewall connection or anyother issue connecting to ldap from the netwrok . How can i trouble shoot it ?