> For the complete documentation index, see [llms.txt](https://support.whapi.cloud/help-desk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.whapi.cloud/help-desk/troubleshooting.md).

# Troubleshooting

- [Couldn't Link Device – WhatsApp QR Code or Pairing Code Fails](https://support.whapi.cloud/help-desk/troubleshooting/couldnt-link-device-whatsapp-qr-code-or-pairing-code-fails.md): Trouble linking your WhatsApp number? Learn how to fix the "Couldn't link device. Try again later" error when connecting via QR code or pairing code in Whapi.Cloud. Simple solutions to restore connect
- [Channel status “SYNC\_ERROR”](https://support.whapi.cloud/help-desk/troubleshooting/channel-status-sync_error.md)
- [QR code scanning issues: What could be going wrong?](https://support.whapi.cloud/help-desk/troubleshooting/qr-code-scanning-issues-what-could-be-going-wrong.md): Can't scan the QR code in WhatsApp. What could be the reason?
- [Not getting a READ status on webhook](https://support.whapi.cloud/help-desk/troubleshooting/not-getting-a-read-status-on-webhook.md): When you send a message to WhatsApp, the webhook receives alternating events of the message being delivered and the message being read. Let's look at the reason why you might not receive a READ status
- [CORS error](https://support.whapi.cloud/help-desk/troubleshooting/cors-error.md)
- [429 (Too Many Requests) - Soft Ban](https://support.whapi.cloud/help-desk/troubleshooting/429-too-many-requests-soft-ban.md): A few tips on what to do if you encounter a soft ban
- [“Waiting for this message. This may take a while” – WhatsApp Message Error](https://support.whapi.cloud/help-desk/troubleshooting/waiting-for-this-message.-this-may-take-a-while-whatsapp-message-error.md): Seeing “Waiting for this message. This may take a while” in WhatsApp? Learn why it happens, how to fix it by updating WhatsApp, reconnecting devices, and using WhatsApp Business for better stability.
- [Missing push notifications after connecting to API](https://support.whapi.cloud/help-desk/troubleshooting/missing-push-notifications-after-connecting-to-api.md): This problem can occur with iPhones when you stop receiving incoming push notifications after connecting to the gateway
- [Timeout or very slow sending of large media messages](https://support.whapi.cloud/help-desk/troubleshooting/timeout-or-very-slow-sending-of-large-media-messages.md): When sending large media files (images, videos, audio, voice messages, or documents), the request may take a very long time to complete, return no response at all, or return a Timeout 524 error.
- [Why does my iPhone show an endless WhatsApp sync notification that drains the battery?](https://support.whapi.cloud/help-desk/troubleshooting/why-does-my-iphone-show-an-endless-whatsapp-sync-notification-that-drains-the-battery.md)
- ["This May Be a Scam" Warning When Linking a Device](https://support.whapi.cloud/help-desk/troubleshooting/this-may-be-a-scam-warning-when-linking-a-device.md): When connecting your WhatsApp number by scanning the QR code or entering a pairing code, you may see a warning screen from WhatsApp
- [Other](https://support.whapi.cloud/help-desk/troubleshooting/other.md)
- [What does "This group is no longer available" mean?](https://support.whapi.cloud/help-desk/troubleshooting/other/what-does-this-group-is-no-longer-available-mean.md)
- [Error "404. Wrong invite code"](https://support.whapi.cloud/help-desk/troubleshooting/other/error-404.-wrong-invite-code.md)
- [Error "401. Need channel authorization"](https://support.whapi.cloud/help-desk/troubleshooting/other/error-401.-need-channel-authorization.md)