sfandm1

Hi everyone, I am new here, and this is my first post. Hopefully someone can help. I recently downloaded a software for work related which is a security based program. I made sure that I am the system administrator, but I keep getting this error message when I go to attach documents to the site. This is a screenshot of the actual error message. Can someone maybe explain what I might be needing to do? Thank you all in advance, and BTW, this is an awesome sight.