FIX: Handle empty dict

src/caosadvancedtools/table_json_conversion/fill_xlsx.py

@@ -188,7 +188,7 @@ class TemplateFiller:
                 if not isinstance(value, (dict, list)):
                     self[name] = value
                 elif isinstance(value, dict):
-                    if isinstance(list(value.items())[0], list):
+                    if not value or isinstance(list(value.items())[0], list):
                         continue
                     old_path = self._current_path
                     new_path = self._current_path.copy() + [name]