Error while creating sync folder via Vagrant in Ubuntu (VirtualBox)

I get the following error:

The following SSH command responded with a non-zero exit status. 
Vagrant assumes that this means the command failed!
mkdir -p /home/myuser/synced

Host: Windows 10 Guest: Ubuntu Server 17.10

My Vagrantfile:

# -*- mode: ruby -*-
# vi: set ft=ruby :


Vagrant.configure("2") do |config|

  config.vm.box = "mybox"

  config.ssh.shell = "bash -l"
  config.ssh.username = "myuser"
  config.ssh.password = "mypassword"  

  config.vm.synced_folder ".", "/vagrant", disabled: true
  config.vm.synced_folder "data", "/home/myuser/synced", create: true, group: "mygroup", owner: "myuser"

end

When logged in via SSH into guest I can invoke

mkdir -p /home/myuser/synced

without any problems.

Copyright Notice：Content Author:「tmk1」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/48750434/error-while-creating-sync-folder-via-vagrant-in-ubuntu-virtualbox