Kindle "The book could not be opened"

Hi

I am trying to open a book from my iMAC with the Kindle App (downloaded from App Sote yesterday, I assumed is the latest) and getting this error:

"The book could not be opened. Please remove the book from your device and redownload it."

The OS is Catalina 10.15.7.

I have tried:

• Deleted the book and re downloaded the book again.
• De-regesistered and Registered the device again.

Both of the above did not help.

I know the book is ok as I can open it from:

• iPhone with Kindle app
• iPad with Kindle app
• the web

Thanks in advance!!!