We check your project https://github.com/phacility/phabricator/ with static analyzer AppChecker, it found possible problem in code:
File scripts/ssh/ssh-exec.php, line 132 (https://github.com/phacility/phabricator/blob/aa6c993848797d792a886b4a570f20ca897ade7e/scripts/ssh/ssh-exec.php#L132)
if (!$device) { throw new Exception( pht( 'Invalid device name ("%s"). There is no device with this name.', $device->getName())); }
Probably it should be:
if (!$device) { throw new Exception( pht( 'Invalid device name ("%s"). There is no device with this name.', $device_name)); }
Hope this will help you