It is saying the Clarkson Certificate is not valid. Last week I downloaded Pro fine. Today I cannot download Core. Help says to click on "Download from another source" but that page disappears in microseconds so cannot click on that. I tried this with several browsers and on two Win11 PCs. Is there some other way to reach other sources?
Hi and welcome.
Try kernel.org which is (should be) available worldwide:
Welcome to the Forum!
Here are a List of the Mirror Servers:
Try it with downloading from one of them. I also will add here @AZorin and @zorink too.
For an unknown reason, yesterday that link took me to the same Clarkson malfunctioning link and got me nowhere. But today the link worked taking me to a list of mirrors. The link that worked was: https://zorin.com/os/mirrors/ . Thank you for your help.