Iptables service stopped after restart VPC HestiaCP Version 1.4.1

[Felix]

Thank you very much @eris for pointing me to the right direction!
After your message and a little bit of search-engine help and manpage, I realized what I needed to do to fix this. I’m posting here for future reference in the hope the information will also help others:

apt install networkd-dispatcher

Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  iw | wireless-tools
The following NEW packages will be installed:
  networkd-dispatcher
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 14.4 kB of archives.
After this operation, 67.6 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal/main amd64 networkd-dispatcher all 2.0.1-1 [14.4 kB]
Fetched 14.4 kB in 0s (302 kB/s)
Selecting previously unselected package networkd-dispatcher.
(Reading database ... 48245 files and directories currently installed.)
Preparing to unpack .../networkd-dispatcher_2.0.1-1_all.deb ...
Unpacking networkd-dispatcher (2.0.1-1) ...
Setting up networkd-dispatcher (2.0.1-1) ...
Created symlink /etc/systemd/system/multi-user.target.wants/networkd-dispatcher.service → /lib/systemd/system/networkd-dispatcher.service.
Processing triggers for man-db (2.9.1-1) ...

2. Copy modified file 10-hestia-iptables in /usr/lib/networkd-dispatcher/routable.d
3. Again set executable flag on that file

Cheers!