Error extracting package, could not pack transport
This question has been answered by opengeek. See the first response.
if (!$package->pack()) {
$message = "Error extracting package, could not pack transport: {$package->signature}";
$modx->log(modX::LOG_LEVEL_ERROR, $message);
echo "{$message}\n";
}

Error extracting package, could not pack transport: mydomain.com-130725.1623.04-2.2.6-pl Vapor execution completed without exception in 4.0251s