The MediaWiki extension ArticlePlaceholder have problems to render a page if the connected Wikidata item have references.
The error message presented is (in Esperanto):
"Lua-eraro en mw/ext/articlePlaceholder/referenceRenderer.lua, linio 38: attempt to call method 'getCurrentFrame' (a nil value)."
See examples:
https://eo.wikipedia.org/wiki/Speciala%C4%B5o:AboutTopic/Q600147 (with references)
https://eo.wikipedia.org/wiki/Speciala%C4%B5o:AboutTopic/Q60068754 (without references)