Description of problem:
The RHDS Console is failing to load the replication configuration.

The JS Console shows:
=============================================================
CMD: loadReplSuffix: Load the replication info ==> dsconf -j ldapi://%2fvar%2frun%2fslapd-supplier_1.socket replication get-changelog --suffix o=test
VM62:1 Uncaught SyntaxError: Unexpected token 'u', "usage: dsc"... is not valid JSON
    at JSON.parse (<anonymous>)
    at Function.<anonymous> (index.js:2:2030486)
    at cockpit.js:1:12867
    at cockpit.js:1:12978
    at L (cockpit.js:1:12383)
=============================================================

Version-Release number of selected component (if applicable):
$ cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.7 (Ootpa)
$

$ rpm -qa | grep 389-ds
389-ds-base-libs-1.4.3.31-6.module+el8dsrv+16980+c4b9cd33.x86_64
cockpit-389-ds-1.4.3.31-6.module+el8dsrv+16980+c4b9cd33.noarch
389-ds-base-1.4.3.31-6.module+el8dsrv+16980+c4b9cd33.x86_64
$

How reproducible:
Always

Steps to Reproduce:
1. Launch the RHDS Console
2. Select the Replication tab
3. The page will show a running spinner and will fail to load the replication data

Actual results:
Cannot see the replication configuration with the RHDS Console.

Expected results:
Working Web UI.

Additional info:

The command is failing because of the option --suffix:

$ dsconf -j ldapi://%2fvar%2frun%2fslapd-supplier_1.socket replication get-changelog --suffix o=test
usage: dsconf [-h] [-v] [-D BINDDN] [-w BINDPW] [-W] [-y PWDFILE] [-b BASEDN]
              [-Z] [-j]
              instance
              {backend,backup,chaining,config,directory_manager,monitor,plugin,pwpolicy,localpwp,replication,repl-agmt,repl-winsync-agmt,repl-tasks,sasl,security,schema,repl-conflict}
              ...
dsconf: error: unrecognized arguments: --suffix o=test
$

It works fine without that option:

$ dsconf -j ldapi://%2fvar%2frun%2fslapd-supplier_1.socket replication get-changelog
{
    "type": "entry",
    "dn": "cn=changelog5,cn=config",
    "attrs": {
...
$