Hi there,
I am also struggling with this software on a new M1 MacBook Pro running Monterey (macOS 12.1).
The E85.30 Endpoint_Security_VPN.pkg installer launches just fine and installs the VPN software.
Unfortunately, the simple act of installing it appears to break routing and everything network related stops working.
My home network is pretty simple and is managed by a NetComm modem on network 192.168.20.0/24.
After installing the software the network becomes inaccessible. I have tried restarting but this make no difference.
Running the Uninstaller restores network connectivity.
FWIW, the Capsule VPN works just fine, but I have to configure a lot of custom routing by hand each day.
If there is anything I can do to assist with this problem please let me know. I am network and unix savvy.