Looks like the problem was with my TLS settings. They got wiped out after the upgrade/uninstall process. TLS was disabled on the LEM Appliance, and after reinstalling Reports I forgot to add the certificate back to the Credential Manager in the Reporting install.
I also got a lesson on Inferred Alerts. I was expecting some Inferred Alerts to populate in the report but the Rules that I setup only had a "Send Message" action. I had to add "Inferred alert" actions to those rules which were missing it.
BTW Cody from SolarWinds support is awesome.