Cant View Download Page

Hi,
This is the plugin i have been looking for.
But unfortunately i am having some issues setting it up.
I have just installed and configured, uploaded to a category. After uploading it gives me an option to view the download. But the page keeps loading forever. Both firefox and chrome.
I would appreciate help with this so i can purchase the pro version.

https://www.ads-software.com/plugins/cm-download-manager/