The link is now fixed. I also attempted to fix the image, but currently it's only half-working: if the link was recently clicked, and bugzilla still has a cache of the generated image, then it will show up on the page. Otherwise, it won't show up until the next time the link is visited. I don't know how to force bugzilla to refresh the image when the bugstats page is loaded. :-(
Comment #2 by jack — 2015-12-16T01:47:05Z
*** Issue 15059 has been marked as a duplicate of this issue. ***
Comment #3 by code — 2018-05-15T11:41:23Z
*** This issue has been marked as a duplicate of issue 13012 ***