Configuring LDAP fails with: No matching method found: processExtendedOperation for class com.unboundid.ldap.sdk.LDAPConnection

When trying to add LDAP authentication get the following error on Save Changes:
No matching method found: processExtendedOperation for class com.unboundid.ldap.sdk.LDAPConnection

Parameters:
LDAP authentication: Enabled
LDAP Host:<FQDN to LDAP server group>
LDAP Port: <default>
LDAP Security: StartTLS
DN: <bind DN>
Password: <bind password>
User Search Base: <base DN>
User Filter: (&(objectClass=<filter class>))
Email Attribute: mail
First Name Attribute: <default>
Last Name Attribute: <default>
Synchronize Group Memberships: Disabled
Group Search Base: <blank>

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I have this error too and so far couldnt figure out how to solve it. Did you find a solution @jlundberg ?

I was using 0.31.2 and had the same issue.
The problem disappeared after upgrading to 0.32.5

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