The documentation for ldapQueryPassword lists String as its type.  Per https://jira.mongodb.org/browse/DOCS-12786 it should be either String or Array.

Present in:

https://docs.mongodb.com/v4.4/reference/configuration-options/#mongodb-setting-security.ldap.bind.queryPassword

https://docs.mongodb.com/v4.4/reference/configuration-options/#security-options

https://docs.mongodb.com/v5.0/reference/configuration-options/#mongodb-setting-security.ldap.bind.queryPassword

https://docs.mongodb.com/v5.0/reference/configuration-options/#security-options