PlantUML Error when PlantUML file has an include file ('PlantUMLHTTPError' object has no attribute 'message')

[NovoLearn]

Hi, I'm trying to get plantuml to create an SVG from a Plant UML file that has a file include in it

Example Plant UML File: my_yaml_file.puml:

@startyaml my_yaml_file.yml
title my_yaml_file.yml
!include /path/to/my_yaml_file.yml
@endyaml

When plantuml sends to the file to PlantUML server to create a diagram as SVG file, the following error message is returned:
ERROR - Error generating diagram my_daigram_name.svg: 'PlantUMLHTTPError' object has no attribute 'message'

The PlantUML Server url for the SVG file creation is: http://my_local_plantUML_server_url/SVG/ENCODED.

Anything that I'm doing wrong here, or a current limitation perhaps?

[JoachimCoenen]

I got the same error without a file include. Here's a stacktrace:

Error:, Traceback (most recent call last):
  [...]
  File "C:\users\Someone\Somewhere\modelGraphScript.py", line 54, in generatePlantUmlSVG
    return plantuml.PlantUML(URL_PLANTUML_SVG).processes(plantUmlText)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
  File "C:\users\Someone\Somewhere\.venv\Lib\site-packages\plantuml.py", line 173, in processes
    raise PlantUMLHTTPError(response, content)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "C:\users\Someone\Somewhere\.venv\Lib\site-packages\plantuml.py", line 56, in __init__
    if not self.message:
           ^^^^^^^^^^^^
AttributeError: 'PlantUMLHTTPError' object has no attribute 'message'

[JoachimCoenen]

It looks like this bug has already been fixed in December 2019, but the last release is from November 2019.
the bad line now reads: if not getattr(self, 'message', None):.
This project does not seem to be maintained anymore. See: Issue #22.