You experience that opening shop or support article links from fogcreek.com are not working. The same happens when trying to open renewal links from FogBugz FYS.
Typical links that are not working, are obsolete and might show certificate error:
FogCreek.com domain is no longer with FogBugz.
FogBugz (and Manuscript) related resources, like Shop and Help Center are available under fogbugz.com domain: