NIM ANYWHERE -> 500 Server Error TypeError: argument of type 'bool' is not iterable

[gittiery]

Hi -I've been trying to get this 'NIM Anywhere' project to run via NVIDIA Ai Workbench, and I get all of these started and all seem to be running fine:

---

Compose
RUNNING

milvus | RUNNING
redis | RUNNING

Project Container
RUNNING

Applications
VS Code

Chat Frontend
RUNNING

Chain Server
RUNNING

Tutorial
RUNNING

JupyterLab
RUNNING

---

But when I click on 'Open Chat Frontend' I get a double column page in my browser, where both columns are identical, and say:

500 Server Error TypeError: argument of type 'bool' is not iterable

And under that is this long 'Traceback' that I have posted below. Can anyone tell me what is wrong here? As I haven't edited the files or anything. And the tutorial in this works ok I guess - though it doesn't seem like much of a tutorial at all. And I can't find any info regarding this particular error for the NIM Anywhere container. If anyone can please help me it would be GREATLY APPRECIATED !

Thanks in advance for any replies!

-patrick

traceback posted below:

Traceback

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 887, in get_type ‒

886. def get_type(schema: dict):

887. if "const" in schema:
     

888.     return "const"
     

889. if "enum" in schema:
     

890.     return "enum"
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 928, in _json_schema_to_python_type ‒

925. """Convert the json schema into a python type hint"""
     

926. if schema == {}:
     

927.     return "Any"
     

928. type_ = get_type(schema)
     

929. if type_ == {}:
     

930.     if "json" in schema.get("description", {}):
     

931.         return "str | float | bool | list | dict"
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 982, in _json_schema_to_python_type ‒

980.     if "additionalProperties" in schema:
     

981.         des += [
     

982.             f"str, {_json_schema_to_python_type(schema['additionalProperties'], defs)}"
     

983.         ]
     

984.     des = ", ".join(des)
     

985.     return f"dict({des})"
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 975, in ‒

972.     props = schema.get("properties", {})
     

974.     des = [
     

975.         f"{n}: {_json_schema_to_python_type(v, defs)}{get_desc(v)}"
     

976.         for n, v in props.items()
     

977.         if n != "$defs"
     

978.     ]
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 974, in _json_schema_to_python_type ‒

972.     props = schema.get("properties", {})
     

974.     des = [
     

975.         f"{n}: {_json_schema_to_python_type(v, defs)}{get_desc(v)}"
     

976.         for n, v in props.items()
     

977.         if n != "$defs"
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 935, in _json_schema_to_python_type ‒

932.     else:
     

933.         return "Any"
     

934. elif type_ == "$ref":
     

935.     return _json_schema_to_python_type(defs[schema["$ref"].split("/")[-1]], defs)
     

936. elif type_ == "null":
     

937.     return "None"
     

938. elif type_ == "const":
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 965, in _json_schema_to_python_type ‒

962.         )
     

963.         return f"tuple[{elements}]"
     

964.     else:
     

965.         elements = _json_schema_to_python_type(items, defs)
     

966.         return f"list[{elements}]"
     

967. elif type_ == "object":
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio_client/utils.py, line 920, in json_schema_to_python_type ‒

919. def json_schema_to_python_type(schema: Any) -> str:

920. type_ = _json_schema_to_python_type(schema, schema.get("$defs"))
     

921. return type_.replace(CURRENT_FILE_DATA_FORMAT, "filepath")
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio/blocks.py, line 2925, in get_api_info ‒

2922.                 raise TypeError(f"{comp!r} is not a Component")
      

2923.             info = component.get("api_info_as_input", component.get("api_info"))
      

2924.             example = comp.example_inputs()
      

2925.             python_type = client_utils.json_schema_to_python_type(info)
      

2927.             # Since the clients use "api_name" and "fn_index" to designate the endpoint and
      

2928.             # "result_callbacks" to specify the callbacks, we need to make sure that no parameters
      

File /home/workbench/.local/lib/python3.10/site-packages/gradio/routes.py, line 582, in api_info ‒

579.                 app.all_app_info = app.get_blocks().get_api_info(all_endpoints=True)
     

580.             return app.all_app_info
     

581.         if not app.api_info:
     

582.             api_info = utils.safe_deepcopy(app.get_blocks().get_api_info())
     

583.             api_info = cast(dict[str, Any], api_info)
     

584.             api_info = route_utils.update_example_values_to_use_public_url(api_info)
     

585.             app.api_info = api_info
     

File /home/workbench/.local/lib/python3.10/site-packages/gradio/routes.py, line 552, in main ‒

549.             template = (
     

550.                 "frontend/share.html" if blocks.share else "frontend/index.html"
     

551.             )
     

552.             gradio_api_info = api_info(request)
     

553.             return templates.TemplateResponse(
     

554.                 request=request,
     

555.                 name=template,
     

File /usr/local/lib/python3.10/dist-packages/anyio/_backends/_asyncio.py, line 962, in run ‒

959.                 exception: BaseException | None = None
     

960.                 threadlocals.current_cancel_scope = cancel_scope
     

961.                 try:
     

962.                     result = context.run(func, *args)
     

963.                 except BaseException as exc:
     

964.                     exception = exc
     

965.                 finally:
     

File /usr/local/lib/python3.10/dist-packages/anyio/_backends/_asyncio.py, line 2461, in run_sync_in_worker_thread ‒

2458.                 worker_scope = scope._parent_scope
      

2460.             worker.queue.put_nowait((context, func, args, future, worker_scope))
      

2461.             return await future
      

2463. @classmethod
      

2464. def check_cancelled(cls) -> None:
      

File /usr/local/lib/python3.10/dist-packages/anyio/to_thread.py, line 56, in run_sync ‒

53.         stacklevel=2,
    

54.     )
    

56. return await get_async_backend().run_sync_in_worker_thread(
    

57.     func, args, abandon_on_cancel=abandon_on_cancel, limiter=limiter
    

58. )
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/concurrency.py, line 39, in run_in_threadpool ‒

36. if kwargs:  # pragma: no cover
    

37.     # run_sync doesn't accept 'kwargs', so bind them in here
    

38.     func = functools.partial(func, **kwargs)
    

39. return await anyio.to_thread.run_sync(func, *args)
    

42. class _StopIteration(Exception):

File /home/workbench/.local/lib/python3.10/site-packages/fastapi/routing.py, line 214, in run_endpoint_function ‒

211. if is_coroutine:
     

212.     return await dependant.call(**values)
     

213. else:
     

214.     return await run_in_threadpool(dependant.call, **values)
     

217. def get_request_handler(

File /home/workbench/.local/lib/python3.10/site-packages/fastapi/routing.py, line 301, in app ‒

298.             )
     

299.             errors = solved_result.errors
     

300.             if not errors:
     

301.                 raw_response = await run_endpoint_function(
     

302.                     dependant=dependant,
     

303.                     values=solved_result.values,
     

304.                     is_coroutine=is_coroutine,
     

File /home/workbench/.local/lib/python3.10/site-packages/starlette/routing.py, line 73, in app ‒

70.     request = Request(scope, receive, send)
    

72.     async def app(scope: Scope, receive: Receive, send: Send) -> None:
    

73.         response = await f(request)
    

74.         await response(scope, receive, send)
    

76.     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/_exception_handler.py, line 42, in wrapped_app ‒

39.         await send(message)
    

41.     try:
    

42.         await app(scope, receive, sender)
    

43.     except Exception as exc:
    

44.         handler = None
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/_exception_handler.py, line 53, in wrapped_app ‒

50.             handler = _lookup_exception_handler(exception_handlers, exc)
    

52.         if handler is None:
    

53.             raise exc
    

55.         if response_started:
    

56.             raise RuntimeError("Caught handled exception, but response already started.") from exc
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/routing.py, line 76, in app ‒

73.         response = await f(request)
    

74.         await response(scope, receive, send)
    

76.     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
    

78. return app
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/routing.py, line 288, in handle ‒

285.             response = PlainTextResponse("Method Not Allowed", status_code=405, headers=headers)
     

286.         await response(scope, receive, send)
     

287.     else:
     

288.         await self.app(scope, receive, send)
     

290. def __eq__(self, other: typing.Any) -> bool:
     

291.     return (
     

File /home/workbench/.local/lib/python3.10/site-packages/starlette/routing.py, line 735, in app ‒

732.         match, child_scope = route.matches(scope)
     

733.         if match == Match.FULL:
     

734.             scope.update(child_scope)
     

735.             await route.handle(scope, receive, send)
     

736.             return
     

737.         elif match == Match.PARTIAL and partial is None:
     

738.             partial = route
     

File /home/workbench/.local/lib/python3.10/site-packages/starlette/_exception_handler.py, line 42, in wrapped_app +

39.         await send(message)
    

41.     try:
    

42.         await app(scope, receive, sender)
    

43.     except Exception as exc:
    

44.         handler = None
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/_exception_handler.py, line 53, in wrapped_app ‒

50.             handler = _lookup_exception_handler(exception_handlers, exc)
    

52.         if handler is None:
    

53.             raise exc
    

55.         if response_started:
    

56.             raise RuntimeError("Caught handled exception, but response already started.") from exc
    

File /home/workbench/.local/lib/python3.10/site-packages/starlette/routing.py, line 715, in call ‒

712.     """
     

713.     The main entry point to the Router class.
     

714.     """
     

715.     await self.middleware_stack(scope, receive, send)
     

717. async def app(self, scope: Scope, receive: Receive, send: Send) -> None:
     

718.     assert scope["type"] in ("http", "websocket", "lifespan")
     

File /home/workbench/.local/lib/python3.10/site-packages/starlette/middleware/exceptions.py, line 62, in call ‒

59.     else:
    

60.         conn = WebSocket(scope, receive, send)
    

62.     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
    

64. def http_exception(self, request: Request, exc: Exception) -> Response:
    

65.     assert isinstance(exc, HTTPException)
    

File /home/workbench/.local/lib/python3.10/site-packages/gradio/route_utils.py, line 789, in call ‒

786.     headers = Headers(scope=scope)
     

787.     origin = headers.get("origin")
     

788.     if origin is None:
     

789.         await self.app(scope, receive, send)
     

790.         return
     

791.     if scope["method"] == "OPTIONS" and "access-control-request-method" in headers:
     

792.         response = self.preflight_response(request_headers=headers)
     

File /home/workbench/.local/lib/python3.10/site-packages/starlette/middleware/errors.py, line 165, in call ‒

162.         await send(message)
     

164.     try:
     

165.         await self.app(scope, receive, _send)
     

166.     except Exception as exc:
     

167.         request = Request(scope)
     

168.         if self.debug:
     

[Disguised-Coffee]

I came across this issue too, and believe this might be due to the Gradio version used in this project (should be 5.9.1 as of right now). I tried changing the Gradio version to 5.39.0 in requirements.txt and it seemed to work for the chat frontend after rebuilding.

**Update as of 8-18-25

There's also a dependabot PR made earlier too #71