Unable to open /etc/network/interfaces

Operating system: Ubunty 18.04
OS version:

Hi after last upgrade of webmin ad virtualin this message “Unable to open /etc/network/interfaces” appear when virtual min is loaded and i can’t view summary reports like some days ago.

Can you help me ?

Best Regards
Emiliano

Same problema for me, same OS.

This message apears in several screens. I can’ create a new Virtual Server

Anyone can help us??

Here screens where show the error:

You could try this:

# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown

Create a file /etc/network/interfaces with the above content, owned by root with 0644 permission. This is what I see on my Virtualmin on Ubuntu 18.04.

All the best!