Lost connection to the server after adding new bridge to network configuration

In a Proxmox server (Debian), I changed my network config from this: source /etc/network/interfaces.d/* auto lo iface lo inet loopback auto enp0s31f6 iface enp0s31f6 inet static address 88.99.69.241 netmask 255.255.255.192 gateway 88.99.69.193 up route add -net 88.99.69.192 netmask 255.255.255.192 gw 88.99.69.193 dev enp0s31f6 post-up echo 1 > /proc/sys/net/ipv4/conf/enp0s31f6/proxy_arp # route 88.99.69.192/26 via 88.99.69.193 auto vmbr1…