Cloudflare printed this

Error: Too many subrequests by single Worker invocation.

What it meansA single Worker request made more outbound fetch or binding subrequests than your plan's per invocation limit allows, so further calls failed.

The first thing to checkLook for fetches inside loops; batch the requests, cache results, use a single bulk API call, or move fan out work to Queues or a Durable Object.

The walrus saysEvery fetch is a subrequest, and the walrus counts them all.