

[VectorstoreIndexCreator cannot load data from WebBaseLoader](https://github.com/hwchase17/langchain/issues/3542)
```typefor doc in documents:   doc.metadata["source"] = str(doc.metadata["source"])```
[VectorStoreIndexCreator can't load from UnstructuredFileLoader](https://github.com/hwchase17/langchain/issues/2685)
```typehtml_loader = DirectoryLoader(    path=document_dir, glob="**/*.html", loader_cls=BSHTMLLoader)```
instead of pathlib Path







