"There's no bucket called ...": bucket not found

Your provider says the bucket doesn't exist at the address Offloft asked. Check the spelling first, because bucket names are case-sensitive. Then check that the region or endpoint is the one where the bucket was created. On Cloudflare R2, check the account and any jurisdiction. Or create the bucket first.

Check these, in order

1. The name. Copy it from your provider's dashboard.
2. The region. Choose the one the bucket was created in.
3. The endpoint, for providers that use one. It must be the right server.
4. The Cloudflare account. An R2 bucket must belong to this account. For a bucket in the EU or FedRAMP jurisdiction, choose that jurisdiction.

If the bucket disappeared later

Issues shows "Bucket not found", and uploads pause. Your site is fine: files load from your server until this is fixed. Restore the bucket, or click Reconnect to point Offloft at the right one.