Hello, I just switched to Zorin OS 16 today and I am facing an error while trying to run the "sudo apt update" command.
Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification.
I am getting these errors. Any help is appreciable. I have tried using "
sudo apt install ca-certificates" but to no avail.
Welcome to Zorin OS 16, and the Zorin Support Group Forum!
You already appear to know how to enter a terminal, so no need to provide instructions...
Input the command bellow...
sudo apt install ca-certificates
Sometimes a simple restart can fix update issues. And sometimes waiting a day fixes it too.
If this fixes your issue, don't forget to mark this post as solved.
StarTreker
Your Tech Support Guru
Haha i love that master yoda screen 
. Great work you do @StarTreker in helping all those people. I wish i had the knowlegde of you and @Aravisian ... Maybe some day 
Thanks for your effort but it got solved automatically the next day.
Yes it did, and you are welcome! Have a stellar day! 
StarTreker
Your Tech Support Guru