The issue I see in your log file is that you have not updated your version of DeDRM and you are not able to decrypt the file ( Ultimately failed to decrypt after 1.3 seconds ). See the link in my first message in this thread.
Since you appear to be using a version of Kindle for Mac to download the file, that may also be part of your issue. You may want to take a look at the
Dealing with Kindle ebooks in calibre thread if the update to DeDRM does not help.
And this is about as far as I am willing to push this discussion on MobileRead. Any further discussion will have to be taken to the Discussions section of NoDRM's Github site.