I got
A database query error has occurred. This may indicate a bug in the software.
Function: SpecialWhatLinksHere::showIndirectLinks
Error: 0
when I tried to get a list of modules which links to [[Module:HtmlBuilder]]:
https://en.wikipedia.org/w/index.php?title=Special%3AWhatLinksHere&target=Module%3AHtmlBuilder&namespace=828
Version: unspecified
Severity: normal