GCE: cannot login, The VM guest environment is outdated and only supports the deprecated 'sshKeys' metadata item

Question

I cannot ssh into my Google Compute Engine (GCE) Wordpress instance anymore. It was working one month ago when I tried last. I use the Google built-in SSH client in a Chrome bro

Answer 1

Might be a bit late, but you can

1) Stop the VM

2) Edit and enable serial console

3) Use the serial connection to login and update the VM