Fix InferenceUpstreamError

✅ Solution

The "InferenceUpstreamError" in Cloudflare Workers AI usually indicates a problem with the model being unavailable or timing out when accessed by the Workers AI inference server. Ensure the model ID is correct, the model is properly deployed and active on the Cloudflare AI platform, and that the Worker's request doesn't exceed any limits (memory, CPU time). Double-check Cloudflare status pages for service outages affecting Workers AI, and consider implementing retry logic with exponential backoff in your worker to gracefully handle temporary upstream issues; also consider downgrading wrangler to version 4.35.0 to mitigate any recent breaking changes.