Try with material theme

requirements.txt

@@ -1,3 +1,3 @@
 sphinx
-sphinx_glpi_theme
+sphinx-material
 sphinx-toolbox

source/conf.py

@@ -13,7 +13,7 @@
 # serve to show the default.
 
 import datetime
-import sphinx_glpi_theme
+#import sphinx_glpi_theme
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -130,7 +130,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'glpi'
+html_theme = 'sphinx_material'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -140,7 +140,7 @@
 
 # Add any paths that contain custom themes here, relative to this directory.
 # html_theme_path = []
-html_theme_path = sphinx_glpi_theme.get_html_themes_path()
+#html_theme_path = sphinx_glpi_theme.get_html_themes_path()
 
 # The name for this set of Sphinx documents.
 # "<project> v<release> documentation" by default.