131053 means WhatsApp tried to download a file from your installation and could not. It is a transport
problem between Meta and whoever hosts your server, not a problem with the attachment.
You should rarely see it, because Lynomia Chat avoids the situation that causes it.
Why you rarely see it
There are two ways to send a file on WhatsApp: give Meta a URL and let it fetch the file, or upload the file to WhatsApp first and send it by its media id.
Lynomia Chat uploads first and sends by id. The reason is exactly this error: Meta's download path is rate limited per destination network, so on shared hosting your installation can be throttled because of traffic that has nothing to do with you. The refusals that follow are intermittent, which makes them look like a fault in your own file when they are not.
Uploading removes Meta's download from the path entirely.
If you do see it
It means the upload itself did not happen or did not finish, and the send fell back to something Meta had to fetch. Check, in this order:
| Check | Where |
|---|---|
| Is the file very large or very slow to read? | the attachment in the conversation. An upload has a long but finite timeout |
| Did the number stop being connected mid-send? | Settings → Inboxes → the inbox → Account Health |
| Is this one message or every message with a file? | the conversation list, filtered to failed messages |
Press Retry on the message. Because the cause is intermittent, a retry genuinely can succeed here — which is the opposite of 131049, and why Retry is offered.
Who can do this
An agent can retry the message. Reading Account Health and changing anything about the inbox is an administrator's job.
Limits
- Lynomia Chat cannot raise Meta's rate limit. It is per destination network and not something an account setting reaches.
- The file is not re-uploaded in the background. A retry repeats the whole send.
- Repeated failures on every file point at the host rather than at WhatsApp. That is a conversation with whoever runs your server, and the operator's diagnostic is where the evidence is — see when WhatsApp does not work.