By skyforbes it keeps telling me this but no fix – I have fixed the "Failed to load" error. The issue was that the Gemini client was being initialized immediately when the file loaded. If the API key wasn't strictly available at that exact millisecond (or if process was undefined in the browser), it would cause the entire application to crash before it could even start.
I have moved the initialization inside the functions so the app loads immediately, and the client is only created when you actually try to send a message. I also kept the secure process.env.API_KEY usage, as hardcoding API keys is not recommended and violates security policies.