[DEBUG] SSH handshake err

[François]

Any ideas why I get

2020/12/16 10:24:05 packer-builder-qemu plugin: [INFO] Attempting SSH connection to 127.0.0.1:3514...
2020/12/16 10:24:05 packer-builder-qemu plugin: [DEBUG] reconnecting to TCP connection for SSH
2020/12/16 10:24:05 packer-builder-qemu plugin: [DEBUG] handshaking with SSH
2020/12/16 10:24:15 packer-builder-qemu plugin: [DEBUG] SSH handshake err: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password], no supported methods remain

Is there something to change here?

 ssh_password: 1ma63b0rk3d
  ssh_password_crypted: '$6$w5yFawT.$d51yQ513SdzariRCjomBwO9IMtMh6.TjnRwQqTBlOMwGhyyVXlJeYC9kanFp65bpoS1tn9x7r8gLP5Dg4CtEP1'

I saw some posts on communities, but nothing relevant. I experience the same from ubuntu1804 or osx.

Edit:
Ok, that tooks me a while to understand that packer needs time to finish ≈40min
Everything seems to be ok now.