The Category:Pages_with_script_errors shows a big number of false positives, see for instance https://de.wikivoyage.org/wiki/Kategorie:Seiten_mit_Skriptfehlern. This is usually connected with the error-free change of a Lua module. These false positives can be removed only by manually dummy editing the corresponding articles.
While changing a Lua script parsing of articles should temporarily stopped. A process should be started to recheck for real script errors.
Wikivoyage/de extensively uses Wikidata, for instance for marker, vCard and quickbar modules/templates. But a Wikibase Lua entity error is seldomly shown. Most of the articles shown in the category have neither error messages nor a tracking category.
Yeah. It's not only de-wikivoyage problem. A false positives are shown (T170039 can be connected only to part of them), some real errors are NOT displayed: for example pages https://cs.wikipedia.org/wiki/Svat%C3%A1_Lucie_(osoba) and https://cs.wikipedia.org/wiki/Robert_Louis_Stevenson show error (T170039) but no entry in the category (https://cs.wikipedia.org/wiki/Kategorie:%C3%9Adr%C5%BEba:Str%C3%A1nky_s_chybami_skript%C5%AF) is shown.