Setting up Demisto in Splunk?

Splunk Enterprise Security

I'm hosting both Demisto and Splunk ES (Both free edition) on the same network. I have added the API key for Splunk in Demisto and tested successfully. However, when i tried to setup Demisto in Splunk, I keyed in the API key and Demisto IP Address and received an error:
"Encountered the following error while trying to update: Error while posting to url=/servicesNS/nobody/TA-Demisto/demisto/demistocustomendpoint/demistoenv"

I have no certificate and am not using a proxy so the rest of the fields are empty.
Anyone encountered the same issue and can help me out with this? Many thanks!

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Setting up Demisto in Splunk?

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Thanks for the Memories: .conf26 Took Learning to New Heights

Best Practices: Splunk auto adjust pipeline queue

Splunk Auto Ingestion Parallel Pipeline Scaling