Information:
As of the operating system version macOS Catalina 10.15.4, a note appears regarding a kernel extension from "NCP engineering GmbH".
This kernel extension is necessary for the correct operation of the Advanced VPN Client on macOS.
We do not recommend a future update to the following operating system macOS 10.16 (expected to be available in autumn / winter 2020) until LANCOM Systems provides a new version of the Advanced VPN Client macOS, compatible with macOS 10.16.