I'm getting this warning on my search peers. After some digging around (and trying this on some brand spanking new setups) I found out it has something to do with Splunk calling services/admin/auth-keys and not getting an appropriate response back. But I'm still baffled why, at first I thought I misconfigured something but after doing a test setup with just one search head and one search peer I get the same issue. This makes me doubt if this is "working as intended" or something else..
Any ideas anyone?