I have a C-5 and updated to ver 2.4.0.151 and ever since that update, the ZigBee network is offline, i did try to restore the previous firmware, and same issue, soft reset, full, reset, still no joy.
Respectfully
Remus
You did a full reset? As-in reset the entire hub including the radios from the Diag Tool under Advanced section?
I did a full reset couple of times for Diag Tool, still no joy