I have checked that this collector has been migrated from old version 1.4 or newly Registered on 2018-November-28, please check the status after 48 hours.
If that does not change then it means that one of the added vCenter endpoints has an issue with syncing data, we may need to identify if any ESXi host in the VC Inventory lying as "Disconnected \ Not Responding" state or that vCenter should be restarted.
I have the same problem. It is a new deployment of Skyline 2.0 and all of my 3 Vcenters are showing the same error. It is only VC_Changes is in Red, everything else is in green. All ESXi hosts are showing as connected and without any errors. Is there anything else that I need to check?
VC_Changes should change there state to green in next 48 hours, also I would advise identifying if any ESXi host in the VC Inventory lying as "Disconnected \ Not Responding" state or that vCenter should be restarted because one of the added vCenter endpoints has an issue with syncing data.
I'm showing "VC_CHANGES" as red as well. The error I get is "Couldn't upload data to the REST endpoint. HTTP status line: 403, Requests by this collector instance or IP are throttled." The vCenters that are connect do not have any hosts that are disconnected or not responding.
Collecter version: 184.108.40.206
vCenter versions: 6.5
ESXi host versions: 6.5