Gemini fails on every attempt. What should I check?
Update to v1.6.4 first — the error message now names the real cause. The most common ones for new keys: the daily free-tier quota is exhausted (wait for the reset or enable billing), or the "Generative Language API" isn't enabled on the Google project (enable it in Google AI Studio / Cloud Console). The "Test" button next to your Gemini key in Settings now gives the same truthful diagnostic.