In API Connect 508x the user cannot see any analytics in CMC UI.
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Red Indices are caused by network or connection issues. This status means indices is corrupt and any analytics data associated with it cannot be viewed.
Solution: In post 5.0.8.x versions of API Connect, there is command called ‘system clean analytics’
System clean analytics - Removes all of the analytics information from the system.
Please follow the steps in the below link if you have more than 1 management server in the cluster.