Can you make sure that you're not closing or refreshing the web page immediately after you click Install Now, and are waiting for the <abc>_Setup.exe to download and run?
As one of the causes listed is that a firewall could be blocking the necessary ports,have you tried temporarily disabling your firewall or opening up ports 80 and 443?
If that doesn't work, you may want to consider using one of the alternative download methods, specifically Browser Download which can be accessed via Matt, our Virtual Agent.
Here to help if additional assistance is needed, otherwise please accept as a solution so that others can benefit from this information.
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