Could not activate connection: Connection 'ens33' is not available on device ens33 because device is strictly unmanaged

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Hi,

I have one RedHat8 virtual machine connected via bridge to my Wifi router, in order to have connection to outside.

The machine has an static IP configuracion settled in the /etc/sysconfig/network-scripts path as follows:

[root@system network-scripts]# cat ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
IPV4INIT=yes
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.0.40
PREFIX=24
GATEWAY=192.168.0.1
DNS1=192.168.0.1
DOMAIN=example.com
IPV6INIT=no
UUID=c96bc909-188e-ec64-3a96-6a90982b08ad

But when I execute it appears that the the network devices ( indeed all of them) are strictly unmanaged:

[root@system network-scripts]# nmcli
virbr0: unmanaged
        "virbr0"
        bridge, 52:54:00:3C:B9:DD, sw, mtu 1500

ens33: unmanaged
        "Intel 82545EM"
        ethernet (e1000), 00:0C:29:1A:D0:D0, hw, mtu 1500

lo: unmanaged
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

virbr0-nic: unmanaged
        "virbr0-nic"
        tun, 52:54:00:3C:B9:DD, sw, mtu 1500

vnet0: unmanaged
        "vnet0"
        tun, FE:54:00:0A:5C:6D, sw, mtu 1500

I dont understand why because NetworkManager is up and running :

[root@system ~]# systemctl status  NetworkManager
● NetworkManager.service - Network Manager
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2021-08-24 23:50:48 CEST; 6min ago
     Docs: man:NetworkManager(8)

Also, I have tried to restart the service, but I have not succeeded

Later on, I have tried to changed this state using the GUI interface , executing nmtui comand, everything was indeed configured, but ,when I have tried to activate the connection, nmtui, warns me that I cannot:

Could not activate connection: Connection 'ens33' is not available on device ens33 because device is strictly unmanaged

What am I doing wrong?

I would appreciate if anyone could provide any help to solve this issue

Thanks in advance

EL

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