Gateway is running in emergency activation mode

On my newly installed version 7.7.8 and activation of the Developer License key I get a warning “This Gateway is running in emergency activation mode. 7 days, 11 hours, 43 minutes, 27 seconds remaining.” What does it mean and how to overcome it?

I requested for a new OPC UA key and got one by mail. On installing it, the prolem seems to resolved now.

Please ignore my previous mails.
regards
prafull