I see other old topics like this but this might be an issue with the latest release, 0.13.1.
I cloned a wiki repo from GitHub. We have links like [Getting Help](Getting-Help).
When the repo is cloned the files get a .md extension. When clicking the link in Preview it shows the "Windows cannot find '....\Getting-Help'. I'm hoping that if it fails to find that file that it tries to find a similar name.md before giving up.
Customer support service by UserEcho