Ubuntu 18.04.4 Desktop: since last upgrade : Wired unmanaged with the previous network configuration files

Last evening I made the requested packages upgrade for Ubuntu 18.04.4 Desktop. But now I'm not able to connect to the network anymore with the previous network configuration files. These are the packages upgraded:

Here's the NetworkManager.conf file content:

$ sudo nano /etc/NetworkManager/NetworkManager.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no     

Following these indications: No wired connection - Wired unmanaged ubuntu 18.04

I tried to put managed=true in /etc/NetworkManager/NetworkManager.conf and run

sudo service network-manager restart

followed by a system reboot.
But the problem still persists.

Modifying the 01-network-manager-all.yaml file:

$ sudo nano /etc/netplan/01-network-manager-all.yaml
#Let NetworkManager manage all devices on this system
network:
  version: 2
  #renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: no
      addresses: [192.168.1.7/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

to

network:
  version: 2
  renderer: NetworkManager
  #renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: trye
      #dhcp4: no
      #addresses: [192.168.1.7/24]
      #gateway4: 192.168.1.1
      #nameservers:
      #  addresses: [8.8.8.8,8.8.4.4]

made the wired connection working again.

What happened due to this Ubuntu 18.04 package upgrade?

NetworkManager

Edit /etc/NetworkManager/NetworkManager.conf and change "managed" back to false.

Assure that /etc/network/interfaces only contains the following active lines:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

Set your /etc/netplan/01-network-manager-all.yaml back to:

network:
  version: 2
  renderer: NetworkManager

sudo netplan generate

sudo netplan apply

reboot

Then configure your wired connection using the NetworkManager GUI.