Cloudmin dedicated server installation help

Dear friends,

I'm trying to install Cloudmin on my own server. I use the GPL version on CentOS 7. Previously, I used Virtualmin. So I'm disappointed that my Cloudmin installation did not go as planned.

I log in to the Control Panel right after installing it from the installation script and I get the following error message:

HTML code:

This system can not be a KVM host: no bridge interface such as br0 has been found. Virtual systems can not be created or added until it is fixed.

When I follow these instructions to change network interfaces:
https://www.virtualmin.com/documenta…ualization/kvm

I can not connect I've directly connected a monitor to the server, but this one can not ping anything; network configurations are therefore bad. However, as far as I know, I followed all the instructions. Please help.

Please see my pictures:
https://drive.google.com/open?id=1Q6…DN0RbBqPieVNHv

descriptions:
Image 1: This is the current setting of my current network interface. This is called enp0s25.
Image 2: This is the setting of the new bridge, called br0. Because the instructions say "fill in the IP address and netmask assigned to eth0", I decided to change the IP address assigned to DHCP, in the same way as the IP address and network mask assigned to eth0. other. I chose enp0s25 like interface.
Image 3: This is the active configuration tab.
Image 4: This is the startup time configuration tab that I have updated with br0 as the interface and the gateway of the image 3.
Image 5: I get no results by pressing "Apply Configuration", but I get a pop-up that warns me that I have disconnected from the server.

Thank you