I'm trying to put my PlantUml diagrams in the Wiki of BitBucket using Markdown. To do that, I use the Gravizo service. Gravizo uses Graphviz to render graphs. It supports DOT, PlantUML, UMLGraph syntax and SVG in JSON format.
This is a test diagram:
@startuml;
Scraper -> Server: ciao
@enduml
I have my diagram code stored in a file of the repo (diagram.uml).
The syntax should be correct, since in the PlantUML viewer works (watch demo)
Hower, in markdown, it shows a broken image. I really don't get what's wrong.
This is the Markdown code I use, with the syntax http://g.gravizo.com/source?file_url_with_uml

Is there a way to debug what's the error? Thank you