Most often this is fixed by apply changes and you have proper roles. Check the permissions on assets.csv under $SPLUNK_HOME/etc/apps/splunk_monitoring_console/lookups and also doublecheck to see if the entry for shcluster exists in the assets.csv.
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To allow traffic on port 8000, you must configure the associated security group and network access control list (network ACL).
Here is the link on aws docs for a website to be hosted and I used the same steps to make it work in initial days:
https://aws.amazon.com/premiumsupport/knowledge-center/connect-http-https-ec2/
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