Error updating 'support system'

Error on upgrade to 1.9.1

Downloading update from https://premium.wpmudev.org/wdp-un.php?action=download&key=removed&pid=36…
Unpacking the update…
An error occurred while updating Support System: The package could not be installed. PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature.