Thanks to the help of @pepijnve this is working in the meantime. The crucial corrections where:
-
Removing the Asciidoctor syntax in the PlantUML files (i.e.
[plantuml]
,….
-blocks etc.) -
Using
plantuml::…
instead ofinclude::…
syntax for pulling in the files into the Asciidoctor document
Sample to show relative imports within PlantUML not working in Asciidoctor if the UML files are not in the Asciidoctor root path.