We are also having this same issue. Already had the edit_http_token capability for my role, that was not a fix.
We are running Splunk 7.0.3 and CentOS 7.4
Seems like a major bug.,I am also having this issue. Running splunk 7.0.3 on CentOS 7.4.
Seems like there is a major bug.
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I answered this for you, looks like you have dups:
https://answers.splunk.com/answers/616300/why-is-the-http-event-collector-not-visible-in-ui-1.html?childToView=617400#answer-617400
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