Problem with license transfer to new gateway

Hi, I got a problem during the license transfer of two gateways. Both have internet connection so the online transfer should have worked. I successfully unactivated the license on the first gateway but the activation on the new one doesn't work (error: unable to activate license). I can't do it offline because the license was already sent to Inductive Automation, but support is just available in a few hours.
Did anyone already have had the same issue?