Kiro An Unexpected Error Occurred, Please Retry | Easy Fix

If you are seeing the error “An unexpected error occurred, please retry” in Kiro (likely the AI-powered code editor/IDE), you are encountering a known issue that has been affecting users frequently in late 2025 and January 2026.

This error typically means the AI agent (Claude/Sonnet) failed to process your request due to server overload, connection timeouts, or a corrupted session context.

Here are the proven fixes, ordered from the easiest to the most technical.

1. The “New Session” Fix (Most Reliable)

The error often happens when the current chat context gets too large or corrupted (e.g., after a long debugging session).

• Action: Open a New Chat or New Window.

• Why: This clears the “memory” of the conversation and usually allows the AI to respond immediately.

2. Check for Updates

The Kiro team releases patches almost daily to fix these stability issues.

• Action:

  • Mac: Click Kiro in the top menu bar > Check for Updates.

  • Windows: Look for the update notification in the bottom right or restart the app.

• Current Status: Ensure you are on the latest version (v0.8.x or newer as of Jan 2026).

Also Read : Script Hook V Error | FATAL: Unknown Game Version

3. Disable “MCP” Servers (If You Use Them)

If you have connected external tools (like GitHub, Linear, or PostgreSQL) via the Model Context Protocol (MCP), these often break the connection.

• Action: Go to your MCP Servers tab in the settings and toggle them OFF temporarily.

• Retry: Try your prompt again. If it works, one of your external tools is causing the crash.

4. Sign Out and Back In

Sometimes your authentication token has expired in the background (especially if you put your computer to sleep).

• Action:

  1. Click your Profile Picture (bottom left).

  2. Select Sign Out.

  3. Restart Kiro.

  4. Sign back in.

5. The “Nuclear” Cache Clear (Last Resort)

If the error persists across restarts and new sessions, your local cache might be broken.

• Mac:

  1. Close Kiro.

  2. Open Terminal and run: rm -rf ~/Library/Application\ Support/Kiro

  3. Warning: This resets your settings/preferences.

• Windows:

  1. Close Kiro.

  2. Delete the folder at %APPDATA%\Kiro.

Is Kiro Down?

If none of this works, the Kiro servers (or the Anthropic/AWS Bedrock API they use) are likely experiencing an outage.

• Check: Visit the Kiro Discord or their GitHub Issues page to see if others are reporting the same error in the last hour.