Hi, using Ubuntu 16.04.6 LTS (4.4.0-67-generic, x86_64) I try to connect to a server with Cisco AnyConnect Secure Mobility Client version 4.6.02074 and I get the error:

Code:
The AnyConnect package on the secure gateway could not be located. You may be experiencing network connectivity issues. Please try connecting again.
What's the problem? How should I solve it?