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Jcdumdumaya

macrumors regular
Original poster
May 31, 2015
111
0
What is this?
 

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It just means that the calendar server from Yahoo has a broken certificate chain.
You could remove your calendar subscription from the Mail preferences.
 
I have this happen very often when I am on hotel WiFi and my session expires. If you are on your home network and internet is working OK for you, press continue and see what happens
 
I have this happen very often when I am on hotel WiFi and my session expires. If you are on your home network and internet is working OK for you, press continue and see what happens
Should I worry about it? Do you still get the issue?
 
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