Copilot Studio “SystemError” – Unexpected Error During Conversation

Question

Copilot Studio “SystemError” – Unexpected Error During Conversation

Vishal Kumar 5

Hello,

I am using Microsoft Copilot Studio and encountering the following error:

“Sorry, something unexpected happened. We’re looking into it. Error code: SystemError.”

Details:

Conversation ID: a:1eg__sIUqEfoVS-FT2ptjzXV6lqilHo8kEo-yYYFRO2AjlPnTuQMl-hNa-TKWlFKZdacMXikr4biz-DtWDJIzchHFx2EEk1Kg0_GjVv51UAiSFaBTEHwcYapV3L26ofl9
Time (UTC): April 1, 2026, 11:08:35 AM

This error occurs while interacting with the Copilot agent in MS Teams app

Could anyone help identify:

Possible root causes of this SystemError
Recommended troubleshooting steps
Whether this is a known issue or service-related problem

Any guidance would be appreciated.

Thanks in advance

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1 answer

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Answer 1

SystemError in Copilot Studio is a generic platform error that indicates a backend or configuration problem that can’t be diagnosed from the client alone.

From the documented behavior:

SystemError is raised when a system-level issue occurs in Copilot Studio and doesn’t produce a detailed user-facing message.
In Teams, it can also appear when Teams is still using an outdated or inconsistent version of the agent after a publish/republish.
For packaged/managed agents (like Store Operations Agent), SystemError typically indicates a backend or configuration issue that requires validation or support-assisted remediation.

Given that this occurs while interacting with the agent in Microsoft Teams, the most relevant root causes and steps are:

Possible root causes

Transient backend/platform issue in Copilot Studio.
Teams using a stale or partially updated configuration of the agent after a recent publish or configuration change.
Agent not fully or correctly published in Copilot Studio.
Environment or solution setup not fully completed (for managed/solution-based agents).

Recommended troubleshooting steps

In Copilot Studio:

Verify the agent is successfully published.
- If not, publish it again.
If the agent is part of a managed/solution-based setup (for example, Store Operations Agent), verify:
- Required flows are enabled.
- Connection references are valid.
- The solution/agent setup has completed without errors.
If the agent was recently imported or updated, republish it to ensure the latest version is available.

In Microsoft Teams:

Refresh the agent configuration used by Teams:
- In the Microsoft Teams admin center, locate the agent app, disable it, wait a few seconds, then re-enable it.
- In Copilot Studio, turn off the Teams channel for the agent, save, then turn it back on.
- Republish the agent after re-enabling the Teams channel.
After these steps, retry the conversation in Teams after a short wait to rule out propagation delays.
Whether this is a known/service-related issue

SystemError is documented as a generic system error in Copilot Studio that requires backend or configuration validation and may need support-assisted remediation.
There is a known limitation where Teams can continue using an older agent configuration after republish, which can cause a generic SystemError during execution until the configuration is refreshed.

If the error persists after republishing and refreshing the Teams channel/app, the next step is to contact Microsoft Support and provide:

Conversation ID
Agent ID
Exact UTC time of the error so the backend logs can be investigated.

References:

Ashlesha Pawar (Tata Consultancy Services Limited) 75 Reputation points Microsoft External Staff

2026-04-02T05:08:35.4766667+00:00

Hi Vishal Kumar,

I see that an AI-generated response has been shared regarding the SystemError in your Copilot Studio agent.

Could you please confirm if that response helped resolve your issue, or if you're still experiencing the error?

From our side, we’d also recommend the following additional checks:

Verify if the issue is reproducible in the Copilot Studio test canvas (outside of Teams) to help isolate whether this is a Teams channel-specific issue.

Check if all connected resources (e.g., flows, connectors) are active and properly configured.

Review environment-level logs around the provided timestamp to identify any backend or execution failures.

Confirm whether the issue occurs for all users or only specific users/scenarios.

If the issue persists after republishing the agent and refreshing the Teams channel, please let us know. We can assist further or help raise this with Microsoft support using the provided Conversation ID and timestamp.

Looking forward to your update.
Ashlesha Pawar (Tata Consultancy Services Limited) 75 Reputation points Microsoft External Staff

2026-04-03T11:03:41.7466667+00:00

Just following up on the answer I shared recently. Could you please let me know if it resolved your issue, or if you need any further clarification?
Vishal Kumar 5 Reputation points

2026-04-07T09:13:33.3+00:00

Hi, @Ashlesha Pawar

We verified the scenario and found the following:

The issue is only occurring in Microsoft Teams and is not reproducible in the Copilot Studio test canvas.

All connected resources (flows, connectors, etc.) are properly configured, as the solution is working fine outside Teams (e.g., in web and test canvas) without any errors.

The issue is impacting all users, as we have tested this across multiple users and observed the same behavior.

We have republished the agent and also refreshed the Teams channel, but the issue still persists.
Please let us know if any additional details are needed from our side.

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Copilot Studio “SystemError” – Unexpected Error During Conversation

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