My company recently purchased PlantUML Diagrams for Confluence in order to model our software system.
The default PlantUML types work fine, but when I try to `!include` a separate file from another host, I'm unable to preview or insert a PlantUML diagram.
An example of including which I've confirmed is not working and renders fine locally, is from this page's quickstart: https://github.com/plantuml-stdlib/C4-PlantUML#getting-started
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml
I also have a similar file that I want to import from bitbucket, again the same issue occurs.