I've been having the same issue. For example trying to download the new sound package for Customizer I either get the mismatch error very quickly (far before it could download the whole package) or Installer just sits there trying to downloading it and getting no where.
I had the same problem when I tried to download larger files through edge. I turned on my wifi and tried downloading it that way, and it worked. I guess the edge network can't handle the big files. Hope this helps you!