Safari Can't Open the Page icloud.com
I received a macbook pro 15" - 2017, used. I have registered as an admin, but I cannot log in with my Apple Id to icloud.com. My usernames and passwords are correct, and I have other macs connected to iCloud. What can I do? Thanks, Enrico
Safari can't open the page "https://www.icloud.com" because Safari can't establish a secure connection to the server www.icloud.com"