Are there changes needed in Katello to accommodate the change in template rendering? Any help would be appreciated, I’m not sure how to resolve this issue.
Looks like those pages still need to be fixed, there is some discussion/investigation on the Katello PR
If you need those pages (subscriptions and RH repos), you can git checkout 416eba8591f1496f9382d76bf3a645ccaf2c69d0 in foreman for now, that seems to be working fine for me.