diff --git a/airflow/www/extensions/init_manifest_files.py b/airflow/www/extensions/init_manifest_files.py
index 57ea10b6529b9..79b244e3b61f4 100644
--- a/airflow/www/extensions/init_manifest_files.py
+++ b/airflow/www/extensions/init_manifest_files.py
@@ -46,7 +46,7 @@ def parse_manifest_json():
     def get_asset_url(filename):
         if app.debug:
             parse_manifest_json()
-        return url_for("static", filename=manifest.get(filename, ""))
+        return url_for("static", filename=manifest.get(filename, filename))
 
     parse_manifest_json()
 
diff --git a/airflow/www/templates/airflow/dag_audit_log.html b/airflow/www/templates/airflow/dag_audit_log.html
index 1cd4e34328dd4..e897396f57298 100644
--- a/airflow/www/templates/airflow/dag_audit_log.html
+++ b/airflow/www/templates/airflow/dag_audit_log.html
@@ -49,7 +49,6 @@
 {% block head_css %}
 {{ super() }}
 <link href="{{ url_for_asset('dataTables.bootstrap.min.css') }}" rel="stylesheet" type="text/css" >
-<link href="{{ url_for_asset('bootstrap-toggle.min.css') }}" rel="stylesheet" type="text/css">
 {% endblock %}
 
 {% block content %}