Error when downloading ebook to Adobe Digital Editions (ADE)

The ADE program has been uninstalled, installed and updated on my personal laptop; however, when downloading an ebook via my university library proxy, I get the following error when attempting to open an ebook (*.acsm file) in the ADE program. The only way to initially gain access to an ebook is using my university library proxy server to access an ebook in the .acsm file format.

Any help would be greatly appreciated.