no way to make the network works on the new ubuntu server.
This is the netplan yaml file:

# To disable cloud-init's network configuration capabilities, write a file

# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:

# network: {config:disabled}

network:

  version: 2

  ethernets:

    enp0s3:

       addresses: [192.168.0.183/24]

       gateway4: 192.168.0.250

       dhcp4: false

       nameservers: 

         addresses: [8.8.8.8,8.8.4.4]

       optional: true

running netplan --debug apply I get:

Error in network definition //etc/netplan/50-cloud-init.yaml line 1 column 1: expected mapping

I'm going crazy, it was so simple before! Why doesn't work? what does it mean this error?