Why can't I upload files in Facebook chat?

“The type of file you're trying to attach isn't allowed!>>

 I was trying to send a file using my Facebook chat and I added the file using the add file button; but I can’t upload!>>

Can anyone help me?”>>

This is not new with Facebook user; sometimes they experience error while uploading a file using Facebook chat. You should check the file name and file extension; it shouldn’t be the prohibited one. You should also try after renaming your file name; it helps. If the problem persists; you can try clearing the web browser history and cache too.>>

Then connect with Facebook live chat support