ODK Briefcase "A network login screen may be interfering with the transmission to the server."

Welcome to the ODK forum, @Jorge_Ivan_Torres_Ca! We're glad you're here. When you get a chance, please introduce yourself here. I'd also encourage you to add a real picture as your avatar because it helps build community!

It looks like your Aggregate server is not producing a response for Briefcase. Could you give more details about your Aggregate deployment?