Mail on iCloud in Safari (and other browsers) shows a completely BLANK screen
After signing into iCloud, I can see my home page. I see Mail and previews of the most recent emails. But when I click on either Mail or specific email, iCloud goes to icloud(dot)com/mail/ and then shows a completely BLANK page. This happens in Safari AND Chrome on my 2020 iMac. I can't see, access, change, anything in a browser for Mail in iCloud.
OS: 13.6.7
iMac 2020 3.8 GHz 8-Core Intel Core i7
iMac (2017 – 2020)