Looking at your issue with WhatsApp file naming, this is a common problem when sending files through HTTP requests. The filename that appears in WhatsApp is determined by how the binary data is structured in your workflow.
Here are a few solutions to try:
• **Use the WhatsApp Business Cloud node instead of HTTP Request** - This node has better file handling and allows you to set the filename properly through the “Input Data Field Name” parameter.
• **If you must use HTTP Request**, ensure your binary data has the correct `fileName` property set. You can use an **Edit Fields (Set) node** before the HTTP Request to modify the binary data:
Set the operation to “Add/Update”
Choose “Binary” as the data type
Set the field name to something like `data.fileName`
Use an expression to reference your desired filename