apt-get error: Sub-process /usr/bin/dpkg returned an error code (1)

#rm /var/lib/dpkg/info/$nomdupaquet* -f

Command Credit: stackoverflow

L2TP with IPSec PSK VPN Keeps Connecting

 I tried to access from home WiFi to a workplace L2TP/IPSec Pre-Shared Key VPN gateway, but the Windows 10 built-in VPN kept connecting. I had asked my ISP customer service team, and they told me that their technical support team would contact me to sort out this problem. I had a doubt that there would be something to be configured or enabled in my Internet WiFi router. I accessed to the route, and enable ALG switch as the below snapshot, and then I tested it again; the VPN gets connected; booom, it works!