Eryk Sun added the comment:
bpo-39393 improved the error message to mention "(or one of its dependencies)".
That's the best we can reasonably do. A developer can monitor "loader snaps"
messages in a debugger in order to discover the missing DLL and the directories
where the loader looked
New submission from Jack Jansen :
On Windows, when ctypes fails to load a DLL, the error message is misleading.
If a dependency of the DLL cannot be found if appears as if the DLL itself
cannot be found.
This issue has always existed on Windows (and I know it is due to what the OS
provides
