In API Connect 508x the user cannot see any analytics in CMC UI.
DipaliDarji 27000755V6 Visits (2455)
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.