"Network Connection Lost" when trying to download purchased apple book - Catalina

As the title says: "Network Connection Lost" when trying to download purchased apple book - Catalina

Have rebooted, signed in and out tried all the 'microsoft' advice and after purchasing a book I can't download it to my mac. Everything works on my mac, from internet, to apps, to email - everything.... just not books that I've purchased. When it comes to those it's 'network connection lost'. All other 'networks' function.

This had been asked before with no solution. How hard can it be to simply purchase and download a book? Ridiculous.

Any ideas?