Sphinx 7 traceback

[oliver-sanders]

A new traceback seen with Sphinx 7:

Traceback (most recent call last):    
  File "lib/python3.9/site-packages/sphinx/builders/html/__init__.py", line 1121, in handle_page    
    output = self.templates.render(templatename, ctx)    
  File "lib/python3.9/site-packages/sphinx/jinja2glue.py", line 200, in render    
    return self.environment.get_template(template).render(context)    
  File "lib/python3.9/site-packages/jinja2/environment.py", line 1291, in render    
    self.environment.handle_exception()    
  File "lib/python3.9/site-packages/jinja2/environment.py", line 925, in handle_exception    
    raise rewrite_traceback_stack(source=source)    
  File "lib/python3.9/site-packages/sphinx/themes/basic/genindex.html", line 28, in top-level template code    
    {{ firstname|e }}    
  File "/net/home/h06/osanders/cylc-doc/src/_templates/layout.html", line 1, in top-level template code                                {% extends "!layout.html" %}    
  File "lib/python3.9/site-packages/hieroglyph/themes/slides/layout.html", line 80, in top-level template code    
    {{ css() }}    
  File "lib/python3.9/site-packages/jinja2/sandbox.py", line 393, in call    
    return __context.call(__obj, *args, **kwargs)                                                                     
  File "lib/python3.9/site-packages/jinja2/runtime.py", line 828, in _invoke    
    rv = self._func(*arguments)                                                                                            
  File "lib/python3.9/site-packages/hieroglyph/themes/slides/layout.html", line 61, in template                                    
    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />                                      
jinja2.exceptions.UndefinedError: 'style' is undefined    

hieroglyph: 2.1.0
sphinx: 7.2.4