Translations:Help:TemplateData/448/en

To fix this, make sure the value after  equals $1 or $2 and that there no spelling mistakes. Alternatively, if it's wikitext, make sure it contains a minimum of $3 and that there are no mistakes in the syntax that would normally cause a template to fail, such as duplicate equals signs or missing/duplicate curly brackets; see the section #Custom formats for the syntax for custom formats.