Hi Roye, sorry for the late response, that was the end of my day.
Let me clear out the scenario, you tried to install indexer, server and dashboard on the same machine but while finishing indexer installation (service is running ok) you found an issue, right?
systemctl status wazuh-indexer shows ok?
can you tell if you could find something here:
grep -iE 'WARN|ERR' /var/log/wazuh-indexer/wazuh-cluster.log