Hi,
I found this error whentrying to change a setting in tunables for the setting "net.link.bridge.pfil_bridge" . After ticking the edit icon, a different setting screen pops up, but not the expected one. I added the screenshoots.
I think this happens for some more entries regarding "bridge" parameters.
Maybe somebody may have a look after this issue.
https://forum.opnsense.org/index.php?topic=21451.msg100838#msg100838