This happened to me today. I copied evernote note links in evernote app on android, but they wouldn't work in evernote windows client. [perhaps it's the same issue on Apple.]
I verified that they still do work on the android side.
The issue appears to be that the windows client expects the link itself (evernote:///view/####...--###-####...) to be terminated with a slash "/" and the android client accepts it either way.
I discovered this by looking at the links - one created on android client that did not work on windows and a newly created one on windows - both work on android.
So you can either edit all the links and add a "/" to the end or re-copy.