Error HttpResponse for each new AI Agent deployed to AI Engine

[alekzan]

I have deployed an Agent to Vertex AI following the documentation:

# DEPLOYMENT: Deploy the app to Vertex AI
from vertexai import agent_engines
from orchestrator_agent import root_agent

remote_app = agent_engines.create(
    agent_engine=root_agent,

    requirements=[
    "google-cloud-aiplatform[adk,agent_engines]",  # pulls Vertex AI + ADK tooling
    'google-adk',
    "google-genai",                                # required for Content/Part
    "python-dotenv",                               # for `load_dotenv`
    ],

    # Upload each local folder that contains importable code
    extra_packages=[
        "./orchestrator_agent",
    ],
    display_name = "Orchestrator Vol 1",
    description = "An AI Agent orchestrator",
    gcs_dir_name   = "orchestrator_vol_1",   # carpeta nueva

    # Optional – user-level env vars (DO NOT include creds or project/location)
)

And it works well, I can create sessions and interact with this deployed agent.

But then uploaded the same agent with small changes in the prompt (i also changed the name of display name and gcd_dir_name), but now i can't even create a new session. I get this error:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.10/site-packages/vertexai/preview/reasoning_engines/templates/adk.py", line 826, in _asyncio_thread_main
    result = asyncio.run(_invoke_async_create_session())
  File "/usr/local/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/usr/local/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/usr/local/lib/python3.10/site-packages/vertexai/preview/reasoning_engines/templates/adk.py", line 817, in _invoke_async_create_session
    return await self.async_create_session(
  File "/usr/local/lib/python3.10/site-packages/vertexai/preview/reasoning_engines/templates/adk.py", line 796, in async_create_session
    session = await self._tmpl_attrs.get("session_service").create_session(
  File "/usr/local/lib/python3.10/site-packages/google/adk/sessions/vertex_ai_session_service.py", line 92, in create_session
    session_id = api_response['name'].split('/')[-3]
TypeError: 'HttpResponse' object is not subscriptable

Any idea what could be happening?

[arnonshtalrid]

Seems like a bug in google-adk 1.41.
Going back to 1.3 solved this issue for me

[NBestsuNgan]

wait really i'm using 1.3.0 right now but still face this issue.

[alekzan]

Use in your requirements google-genai fixed to 1.20.0.
You can use the most updated version of google-adk.
It worked for me.

[svargrain]

I had the same problem and Alekzan's answer helped me solve it. If it helps anyone, this is my current requirements file after delete the google-cloud-aiplatform[agent_engines,adk] dependency.

google-genai==1.26.0
google-cloud-logging>=3.5.0
cloudpickle==3.0
google-adk==1.7.0
google-cloud-storage>=2.10.0
google-auth>=2.22.0
litellm>=1.30.0
google-api-python-client>=2.142.0
deprecated>=1.2.14