Hi Michael,
It seems that this is a bug with the firewall module (It cannot read the correct file because of permissions problem probably). I would try to remove the bridge since you do not really need it. Did you tried disabling the firewall module?
Try to run this without the bridge interface and if you still get the same results open a bug in the Freepbx bug tracker.
Thank you,
Daniel Friedman
Trixton LTD.