Playing around with 2.6

Was attempting to add lastbind module but get error:

cat <<EOF | ldapadd -D cn=config -w mysecret
dn: cn=module,cn=config
objectClass: olcModuleList
cn: module
olcModulePath: /opt/symas/lib/openldap/
olcModuleLoad: lastbind.la
adding new entry "cn=module,cn=config"
ldap_add: Other (e.g., implementation specific) error (80)
additional info: <olcModuleLoad> handler exited with 1

I have no issues doing the above with 2.5 rpm rhel8 pkg.
Is there something im doing wrong?

Any input is appreciated.

Thank you,