Perhaps related to: Bug: Smart Proxies do not sync (Katello 3.15 through 3.18 RC2) - #6 by Thulium-Drake
Check your logs for any python stacktraces.
Perhaps related to: Bug: Smart Proxies do not sync (Katello 3.15 through 3.18 RC2) - #6 by Thulium-Drake
Check your logs for any python stacktraces.