fix page content is empty

api/core/rag/index_processor/processor/paragraph_index_processor.py

@@ -48,6 +48,7 @@ class ParagraphIndexProcessor(BaseIndexProcessor):
                         page_content = page_content[1:]
                     else:
                         page_content = page_content
+                    if page_content:
                         document_node.page_content = page_content
                         split_documents.append(document_node)
             all_documents.extend(split_documents)