Problem
We’re validating file attachments in the Web Messaging SDK. The admin UI shows the upload toggle enabled, but guest sessions keep failing when they send PDFs over 2MB.
Code
widget.sendFile({ file: pdfBlob, mimeType: 'application/pdf' });
Error
413 Payload Too Large with a generic JSON response.
Question
Does the Guest API enforce a hard cap, or do we need to adjust the routing configuration? The docs don’t list the limit. Just the MIME filters.