I would revert these changes and reboot. Then let the cockpit interface create the bridge. If you go to networking, there should be an option to add Add Bridge
I finally succeeded to get a connection back. The problem is that there was a connection named “system enp5s0” and I don’t know if it was there before. So I deleted it and brought the device up again manually with nmcli
I can try again through cockpit but I m afraid that the same error will happen again