Can't download ePub with Aldiko

Recently I received via email an .epub file (eBook). When I try to download it I get an error message that says "Aucune application ne peux afficher la pièce jointe" (no application can show the attached file). There was a short time I don't read on my Android phone, so when I have the first error message I have uninstalled and reinstalled the [Aldiko](https://play.google.com/store/apps/details?id=com.aldiko.android) app. But my phone still tells me with "Aucune application ne peux afficher la pièce jointe" (no application can show the attached file). Has anyone had the same problem? Does anyone have a resolution?