If you are experiencing any unexpected issues during the update procedure of the APPolo Control Server please reboot the Server (power cycle - unplug and plug the card - do not use the restart button in GUI or the Web-Interface).
Please try to upload / activate the new version after the APPolo Server has been rebooted.
If your APPolo Server version is smaller than 6.1.0:
If you still have any issues during the update, please contact us via support ticket.