I also started getting those errors on 16 access points acros a 52 acre site. The issue is affecting APs on different swiches in different locations, on two completely seperate physical networks. All got the error at exactly the same time (13th November at 11:01). Strangely, some access points on the same switches do not have this error. I am unable to find a pattern. Restarted switches, access points, cycle POE ports but nothing seems to resolve it. This is the only post I have found recently and seems strange to be affecting different organisations.
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