I need to upgrade the software on WLC 4402 to 7.0 or higher for use with Cisco 3502i APs.. However, I can't seem find the download link anywhere.. Any help would be awesome!
Please try this link, which will require you to be logged into with your Cisco account first;
That looks like an internal error with the download site. Will likely need to wait for Cisco support to provide a solution, as you're doing everything else right.