AP sslv3 alert certificate unknow

I have 3 access points OAW-AP1301 stellar on the page I have this error “sslv3 alert certificate unknown” on only one AP.
How can I solve?

May check software version on AP where SSLv3 error is seen is same as other two APs.

Where are you seeing this error ? While accessing GUI of the AP etc

yes it’s the same 5.0.1.1066

If you are seeing this error during access GUI of the AP, I would suggest upgrade the AP again to 5.0.1.1066 as I doubt upgrade may have corrupted SSL certificates Or you can reset of the AP. best option open ticket with support to nailed down RCA