diff --git a/nbconvert/exporters/html.py b/nbconvert/exporters/html.py
index 468c1c660..523ea44dd 100644
--- a/nbconvert/exporters/html.py
+++ b/nbconvert/exporters/html.py
@@ -266,6 +266,8 @@ def from_notebook_node(  # type:ignore[explicit-override, override]
                 markdown_collection = markdown_collection + cell.source + "\n"
 
         resources = self._init_resources(resources)
+        print('type:', resources)
+        
         resources["tableofcontents"] = extract_titles_from_markdown_input(markdown_collection)
 
         filter_data_type = WidgetsDataTypeFilter(
@@ -354,8 +356,8 @@ def resources_include_url(name):
             return markupsafe.Markup(src)
 
         resources = super()._init_resources(resources)
-        if resources is None:
-            resources = {}
+   
+        
         resources["theme"] = self.theme
         resources["include_css"] = resources_include_css
         resources["include_lab_theme"] = resources_include_lab_theme