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AMC WebUI

Common Error Troubleshooting

Common Error Troubleshooting

Quick solutions for frequent upstream error codes and parameter mismatches.

1. 403 Forbidden on gemini-robotics-er-2-preview

Cause

Google enforces a mandatory policy for Robotics models: API Keys without explicit usage restrictions are rejected.

Resolution

  1. Visit Google AI Studio API Keys.
  2. Edit your key and apply an API Restriction (e.g., restricting by domain, IP, or project).
  3. Save changes and retry your request in AMC WebUI.

2. Incompatible Thinking Level Errors

Cause

Per official model cards, gemini-3.7-flash and gemini-3.8-flash reject Minimal reasoning levels with API validation errors.

Resolution

  • Adjust the reasoning depth to Low, Medium, or High.
  • Only gemini-3.5-flash-lite accepts Minimal.

3. 429 Too Many Requests (Quota Limit Reached)

Resolution

  1. Key Rotation: Provide multiple Gemini API keys in Settings. AMC WebUI will round-robin across them automatically.
  2. Cap Thinking Budget: Dial down reasoning token budget sliders from 32K to 4096 to conserve quota.