My free em Client hasn’t been able to contact update server for 2 weeks and is now in offline mode. Last time I had a similar problem I downloaded and installed ISRG to update a certificate. It then worked for some period of time but now it doesn’t . I have had a lot of the red triangle failures but with a great deal of aggravation and retries I can get by it, but no more. This software is so frustrating.
Please see this Knowledgebase article. Just install the file and it should be OK.
Thanks for the quick reply Gary. That is the fix I had already applied. When I went to the certificate store I can see the expiration date is the updated value of 6.4.2035.