Desktop Kindle Download has "No Entry" Symbol on Icon
My Desktop Kindle app required a new download. I am working on an old MacBook Pro (Retina, 13-inch, Mid 2014) with 2.6 GHz Intel Core i5 running High Sierra 10.13.6. Upon decompressing the DMG file, the icon for the app shows a no-entry graphic over the app. I am unfamiliar with that. Can anyone help? Thanks.
Earlier Mac models