I was trying to create notes via scribble in my Ipad(6th generation). After syncing it to my macbook air(mojave 10.14.5), all the images notes have been converted to broken untitled attachment. After going through all the posts in discussion forum, I did try the following steps:
Quite evernote and restart it
Uninstall my evernote(10.8.5) and install latest one(10.9.10) for mac
However, the problem still persisted. Interestingly, I am able to access my images from web version. So, it seems like a mac version problem to me. I am attaching the screenshot of my mac evernote.