ADK fails to deploy with 1.18.0 and above

[Alameyo]

I can deploy agent to Vertex AI using adk in 1.17.0 with this command:

    --project=$PROJECT_ID \
    --region=$LOCATION \
    --staging_bucket=$STAGING_BUCKET \
    --display_name="$AGENT_NAME" \
    ArchitectureAgent

However if I update to 1.18.0 and above

pip install google-adk==1.18.0

deployment will fail with this message:

Deploy failed: Failed to create Agent Engine: {'code': 3, 'message': 'Reasoning Engine resource [projects/{redacted_project_ID}/locations/europe-west2/reasoningEngines/{redacted_agent_ID}] failed to start and cannot serve traffic. Please refer to our documentation (https://cloud.google.com/vertex-ai/generative-ai/docs/agent-engine/troubleshooting/deploy) for checking logs and other troubleshooting tips.'}

Still I have other issues with running agent even 1.17 that might or might not be related, but my guess is it shouldn't influence deployment.

[smwitkowski]

We hit the same Agent Engine deployment failure (Reasoning Engine failed to start) and traced it to invalid import/module paths caused by the temp folder name and template import path. We’ve opened a PR with fixes for temp folder sanitization and proper template imports when the agent lives under app/: #4243. Hope this helps—happy to share more repro details if useful.