readthedocs build fails to produce sphinx documentation with shields.io svg badges - python-sphinx

Question

My latest Sphinx documentaion fails when trying to build it with readthedocs. It has apperently something to do with the fact that I am trying to incorporate some badges from https://shields.io/. These badges are .svg graphic files.
I probably need to do some tweaking in my conf.py file?
On my local machine, I am able to produce the Sphinx documentation and all HTML files do look OK.
Here's an excerpt of my conf.py file:
# -- General configuration ---------------------------------------------------
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = [
"nbsphinx",
"numpydoc",
"sphinx.ext.autodoc",
"sphinx_copybutton",
"sphinx.ext.napoleon",
]
napoleon_google_docstring = False
napoleon_numpy_docstring = True
numpy_validation_checks = {all}
# Add any paths that contain templates here, relative to this directory.
templates_path = ["_templates"]
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This pattern also affects html_static_path and html_extra_path.
exclude_patterns = []
# -- Options for HTML output -------------------------------------------------
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
#
html_theme = "sphinx_rtd_theme"
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = []
Here's the text output: https://readthedocs.org/api/v2/build/17082650.txt

Answer 1

Although you may have disabled the epub and PDF builds in the RTD UI, you must take note in the RTD UI under Advanced Settings > Default settings:
These settings can be configured using a configuration file. That's the recommended way to set up your project. Settings listed here are ignored when using a configuration file.
Therefore you must be using a configuration file that enables both pdf and epub builds. Lo and behold:
https://github.com/andreas-vester/df2img/blame/3ba6e046c8d30ab3896b23835513740bd5aa97fa/.readthedocs.yaml#L12-L14
formats:
- pdf
- epub