The workaround provided by Cisco was to use local files obtained from:
I have uploaded both files PSIRT_EOX_OFFLINE.txt and eox_soft.xml into the following directory:
I set permissions on both files for casuser.
The PSIRT EoS/EoL Hardware and Summary Reports now run succesfully.
The PSIRT EoS/EoL Software report fails with the following error:
"INVREP0108: Local file containing XML data is not available. Since the report option is selected as Local, local file is needed to generate the report."
The help is misleading when it comes to the EOX software data. You must NOT extract the EOX_SOFTWARE.zip file. Instead, move this file to the local_xml directory as-is. Make sure the ownership is casuser:casusers, and you will be able to run the report.