500 Internal Server Error when loading Assessments on csawesome 2.12 "Toggle Mixed Up or Write Code Practice" about bookserver HOT 1 CLOSED

 File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/errors.py", line 159, in __call__
    await self.app(scope, receive, _send)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 25, in __call__
    response = await self.dispatch_func(request, self.call_next)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/bookserver/main.py", line 103, in get_session_object
    response = await call_next(request)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 45, in call_next
    task.result()
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 38, in coro
    await self.app(scope, receive, send)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 25, in __call__
    response = await self.dispatch_func(request, self.call_next)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/fastapi_login/fastapi_login.py", line 440, in user_middleware
    return await call_next(request)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 45, in call_next
    task.result()
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/middleware/base.py", line 38, in coro
    await self.app(scope, receive, send)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/exceptions.py", line 82, in __call__
    raise exc from None
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/exceptions.py", line 71, in __call__
    await self.app(scope, receive, sender)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/routing.py", line 580, in __call__
    await route.handle(scope, receive, send)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/routing.py", line 241, in handle
    await self.app(scope, receive, send)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/starlette/routing.py", line 52, in app
    response = await func(request)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/fastapi/routing.py", line 226, in app
    raw_response = await run_endpoint_function(
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/fastapi/routing.py", line 159, in run_endpoint_function
    return await dependant.call(**values)
  File "/srv/web2py/applications/runestone/.venv/lib/python3.9/site-packages/bookserver/routers/assessment.py", line 539, in htmlsrc
    studentId = sid or request.state.user.username