Please increase the offline function or increase the connection speed of the server

After updating to Nuendo 12, I could not start Nuendo 12 through USB Elicenser. Activation Manager starts slowly when the network is unavailable, and often stops responding when Nuendo is closed. Please increase the offline function or increase the connection speed of the server in China.
Or can someone tell me how to disable Nuendo from networking to meet the offline license conditions? I’ve tried firewall blocking Nuendo and Activation Manager’s apps to no avail.
Thanks.