It appears that all links to the old MC Archive host ASSTR are broken. To work around this, I added the ASSTR tag for all posts with the broken links. If that tag is present, you can manually change the url to mcstories.com. Or click on this link to search for the story of interest.
I may go back and update the very many broken links in the future.
This issue is commented upon in all post with the broken links, and is in the main menu under Reviews
Note: Stories are occasionally removed from the archive by Simon on author’s request or plagiarism claim