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.
It is unlikely I will go back and change all the links at this time.
Note: Stories are occasionally removed from the archive by Simon on author’s request or plagiarism claim
The Realms of Mr. Potestas 
Thaank you for sharing this