iCloud Connection Error Safari

Someone must have an idea. This is what my screen shows. First image is when I go to iCloud. Second is the result after the spinning stops. Third image is if I try to login to Discussions (idmsa.apple...). How is that even possible? I am able to login with Firefox.

I have a bit more information. With Inspect Element I found 2 errors on the page:

first error: [Error] Failed to load resource: the server responded with a status of 421 (Misdirected Request) (validate, line 0)

second error: [Error] Failed to load resource: An SSL error has occurred and a secure connection to the server cannot be made. (signin, line 0)

The security configuration issue would then be Apple and I doubt that they have a security problem and I am the only one that is experiencing the issue. A corrupt Safari issue is the most plausible. I am hoping someone familiar with the inards of Safari that might know how to search and destroy the source of corruption.

I have cleared all history and website data, but that didn't seem to fix it.

Did not work unfortunately. I had some doubts before because I tried to access iCloud from another account on the same laptop and it was the same issue there. Whatever it is is system wide and only affecting Apple.