iCloud.com - Safari 13 unable to login, also Apple Support idmsa issues

Hi. I am unable to use to icloud.com in Safari 13 with Macbook Pro mid 2010 running High Sierra.

All i get is the site loading wheel and then the message 'Connection error - iCloud encountered and error while trying to connect to the server'. It doesn't even get to the login window.

I have reset Safari website data and emptied cache in developer mode.

I can use icloud.com in Chrome and Firefox no problem.

I also note that I have issues when I try to use Apple Support pages in Safari, they will not load when i try to log a support query and feel this called all be linked?

I have had to use Chrome to submit this query?!!

I get the attached screenshot message when I try to use Apple support in any way. I have a feeling there is a server connection error in general via Safari but am unable to go further with this.

Apple Support tried a few things but suggest a full recovery. But I feel there is something that can be done before this step?

Thanks in advance.

This is the message screenshot when trying to use iCloud.com in Safari

This is the message screenshot when trying to use Apple Support