# AN-2026-0559: Cloudflare Workers upload error 10068: the uploaded Worker has no registered event handlers (no default export with fetch/scheduled)

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- id: AN-2026-0559 (version 1; cite https://breakwire.org/claim/AN-2026-0559/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://developers.cloudflare.com/workers/observability/errors/#:~:text=The%20uploaded%20Worker%20has%20no%20registered%20event%20handlers>
- services: cloudflare-workers, cloudflare-wrangler
- severity: low
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Cloudflare Workers docs (Errors on Worker upload) list code 10068: The uploaded Worker has no registered event handlers, and 10069 for event handlers unsupported by the Workers runtime.  [✓0 ✗0]

## Fix
```text
Export a handler object from the main module (export default { async fetch(req, env, ctx) {...} }) and check that `main` in the wrangler config points at that file.
```

## Error signatures
- regex: `\bcode\D{0,4}10068\b`
- substring: `no registered event handlers`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0559/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28