In 4.19 installations, the Engine/Extras/MayaLiveLink folder is missing. This is preventing users from being able to access it.
The release notes state "You can find pre-built binaries of the Maya Live Link Plugin inside your Engine installation folder in the following location: Engine\Extras\MayaLiveLink\LiveLinkMaya.zip" but that folder is not present.
Result: The MayaLiveLink folder is not present.
Expected: The folder would be there based on the information posted in the release notes.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-56175 in the post.