Pin Sphinx and revert theme (ReadTheDocs site has errors not in local build)

Author: lmmx

docs/conf.py

@@ -109,8 +109,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-# html_theme = "sphinx_rtd_theme"
-html_theme = "furo"
+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,

setup.py

@@ -27,9 +27,9 @@
 INSTALL_REQUIRES = Path("requirements.txt").read_text().splitlines()
 EXTRAS_REQUIRE = {
     "docs": [
-        "sphinx>=3,<4",
-        # "sphinx_rtd_theme",
-        "furo",
+        # "sphinx>=3,<4",
+        "sphinx==3.5.4",
+        "sphinx_rtd_theme",
         "sphinx-autodoc-typehints==1.11.1",  # don't bump to 1.12.0
         "jupyter-sphinx>=0.3.2",
         "myst-nb",