TypeError: 'bool' object is not iterable

[ch-sander]

Error Message when defining the shmarql sparql endpoint for https://yasgui.org/

log

dataria-shmarql   | INFO:     172.18.0.1:33050 - "GET /sparql?query=ASK%20%7B%3Fx%20%3Fy%20%3Fz%7D HTTP/1.0" 500 Internal Server Error
dataria-shmarql   | ERROR:    Exception in ASGI application
dataria-shmarql   | Traceback (most recent call last):
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/uvicorn/protocols/http/h11_impl.py", line 407, in run_asgi
dataria-shmarql   |     result = await app(  # type: ignore[func-returns-value]
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/uvicorn/middleware/proxy_headers.py", line 69, in __call__
dataria-shmarql   |     return await self.app(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/fastapi/applications.py", line 199, in __call__
dataria-shmarql   |     await super().__call__(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/applications.py", line 112, in __call__
dataria-shmarql   |     await self.middleware_stack(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/errors.py", line 181, in __call__
dataria-shmarql   |     raise exc from None
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/errors.py", line 159, in __call__
dataria-shmarql   |     await self.app(scope, receive, _send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/cors.py", line 86, in __call__
dataria-shmarql   |     await self.simple_response(scope, receive, send, request_headers=headers)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/cors.py", line 142, in simple_response
dataria-shmarql   |     await self.app(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/exceptions.py", line 82, in __call__
dataria-shmarql   |     raise exc from None
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/exceptions.py", line 71, in __call__
dataria-shmarql   |     await self.app(scope, receive, sender)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 580, in __call__
dataria-shmarql   |     await route.handle(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 241, in handle
dataria-shmarql   |     await self.app(scope, receive, send)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 52, in app
dataria-shmarql   |     response = await func(request)
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/fastapi/routing.py", line 214, in app
dataria-shmarql   |     raw_response = await run_endpoint_function(
dataria-shmarql   |   File "/usr/local/lib/python3.9/site-packages/fastapi/routing.py", line 149, in run_endpoint_function
dataria-shmarql   |     return await dependant.call(**values)
dataria-shmarql   |   File "/src/app/main.py", line 313, in sparql_get
dataria-shmarql   |     new_result.qt_turtle(),
dataria-shmarql   |   File "/src/app/px_util.py", line 61, in qt_turtle
dataria-shmarql   |     tmp_store = self.to_store()
dataria-shmarql   |   File "/src/app/px_util.py", line 54, in to_store
dataria-shmarql   |     tmp_store.extend([Quad(s, p, o) for s, p, o in self.result])
dataria-shmarql   | TypeError: 'bool' object is not iterable