Assistance Required – Agent Not Responding

Question

The agent is currently not functioning for the user. It has been identified that the agent is not responding to the user’s questions, and instead, the following error message (FIG - 2) is being returned.

Additionally, the Publish button for the agent is currently unavailable and cannot access (FIG - 01).

Kindly look into you guys' assistance.

Answer 1

Hello W C H Bagya Perera,
The images show a Copilot Studio agent stuck in a failed or corrupted publish state. In Figure-01, the repeated “I’m sorry, I’m not sure how to help with that” messages come from the Copilot fallback orchestrator, not the agent itself, which happens when the agent’s published version is invalid, missing, or cannot load its topics and instructions. In Figure-02, the disabled Publish button and abnormal agent behavior confirm the agent is partially published or locked due to a deployment failure.

Root cause: The agent’s publish pipeline is broken (e.g., failed publish, tool/action error, environment mismatch, or orchestration failure). As a result, channels like Teams or Web route to a generic fallback LLM instead of the agent.

Fixes (in order):

Check for validation errors in Topics, Actions, Plugins, or Connectors and resolve them.

Force a new draft version with a small edit to the agent instructions.

Verify the correct environment (Dev/Prod) is selected.

Remove and re-add channels, then republish.

Inspect tools for schema, credential, or orchestration errors.

Last resort: Clone the agent and publish the clone, which usually resolves corrupted publish states.

The fallback greeting (“How can I help you today?”) confirms the agent briefly dropped to the default orchestrator due to an invalid or failed publish.

Reference Document-

1. https://learn.microsoft.com/en-us/microsoft-copilot-studio/publication-fundamentals-publish-channels?tabs=web
2. https://learn.microsoft.com/en-us/microsoft-365-copilot/extensibility/copilot-studio-experience