How to Fix “An internal error has occurred in Agent” in Android Studio Gemini

Android Studio’s Gemini Agent Mode can stop with An internal error has occurred in Agent when starting a task or partway through a multi-file request. Google tracked this message as Issue #555875043 and lists it among the fixes included in Android Studio Rabbit 2 Canary 1.

Error message

An internal error has occurred in Agent

The message alone does not identify whether the prompt, project build, network, or authentication state is responsible. Start by separating a normal Gradle build, ordinary Gemini chat, and Agent Mode so you know which layer is failing.

Cause

Google’s official fixed-issues page classifies this as a known defect in Android Studio’s Gemini functionality and includes the correction in Rabbit 2 Canary 1. However, the public Issue Tracker entry and release list do not disclose the detailed root cause, exception class, or affected internal component. It would therefore be inaccurate to blame a particular prompt format or project setting without diagnostic evidence.

Conditions and affected versions

• Gemini Agent Mode is used inside Android Studio.
• The agent stops with the internal-error message while starting or continuing a task.
• The Android Studio build predates the fix included in Rabbit 2 Canary 1.

Android Studio Rabbit 2 Canary 1 was released on September 17, 2026, and its official fixed-issues page lists #555875043. Google does not identify the exact first Android Studio version that introduced the defect.

Recommended solution

1. Save all work and check the current Android Studio version.
2. Where preview builds are acceptable, update to Android Studio Rabbit 2 Canary 1 or newer.
3. Restart the IDE and complete authentication if Gemini asks you to sign in again.
4. Retry the prompt in a new Agent session. For a large request, split discovery, editing, and testing into smaller tasks.
5. Review every generated diff and run project tests instead of assuming the agent’s partial work is correct.

Help > About

Android Studio Rabbit 2 | 2026.2.2 Canary 1
or later

Alternatives when you cannot update

• Start a fresh Agent session without carrying over a long conversation or large context.
• Split a multi-file operation into smaller steps such as investigation, one-file edit, and test execution.
• Use regular Gemini chat for analysis or a proposed patch, then apply the change manually.
• If ordinary chat also fails, check the network, proxy, Google account authentication, and whether Gemini is available for the account and region.

How to verify the fix

1. Restart Android Studio after updating.
2. Run a small read-only request in Agent Mode and confirm that it completes.
3. On a test branch, ask the agent to make a small code change.
4. Confirm that no internal-error message appears and that the IDE returns both the diff and execution result.
5. If the error returns, use Help > Collect Logs and Diagnostic Data, review the archive for sensitive information, and attach appropriate diagnostics to an Issue Tracker report.

Cautions

Commit the project before changing IDE versions. Canary builds include experimental changes unrelated to this fix, so validate them in a separate installation or non-production environment first. An interrupted Agent run may leave partial modifications behind; inspect the Git diff before retrying.

Summary

An internal error has occurred in Agent is a known Android Studio Gemini Agent Mode issue. Google lists Issue #555875043 as fixed in Rabbit 2 Canary 1. Because the public record does not disclose the detailed root cause, avoid speculative configuration changes. Update to the fixed build, retry with a clean session, compare Agent Mode with ordinary chat, and collect diagnostics if the failure persists.

Official references

• Google Issue Tracker #555875043
• Fixed issues in Android Studio Rabbit 2
• Android Studio Rabbit 2 Canary 1 (September 17, 2026)
• Report Android Studio issues