Terraform: use of closed network connection

Clash Royale CLAN TAG#URR8PPP
Terraform: use of closed network connection
I'm using this plugin for terraform: https://github.com/terra-farm/terraform-provider-virtualbox
I just try to install an ubuntu 18.04 box in virtualbox.
This is my main.tf
main.tf
resource "virtualbox_vm" "node"
count = 2
name = "$format("node-%02d", count.index+1)"
url = "https://vagrantcloud.com/ubuntu/boxes/bionic64/versions/20180802.0.0/providers/virtualbox.box"
image = "./virtualbox-ubuntu.box"
cpus = 2
memory = "512 mib",
network_adapter
type = "bridged",
host_interface = "en0",
output "IPAddr"
value = "$element(virtualbox_vm.node.*.network_adapter.0.ipv4_address, 1)"
output "IPAddr_2"
value = "$element(virtualbox_vm.node.*.network_adapter.0.ipv4_address, 2)"
When I perform terraform apply it fails with:
terraform apply
2018-08-07T22:17:41.256+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-vbm.go:75: executing: VBoxManage showvminfo node-02 --machinereadable
2018-08-07T22:17:41.346+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-vbm.go:75: executing: VBoxManage showvminfo node-01 --machinereadable
2018-08-07T22:17:41.352+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-vbm.go:45: executing: VBoxManage clonehd /Users/name/.terraform/virtualbox/gold/virtualbox-ubuntu/ubuntu-xenial-16.04-cloudimg-configdrive.vmdk /Users/name/.terraform/virtualbox/machine/node-02/ubuntu-xenial-16.04-cloudimg-configdrive.vmdk
2018-08-07T22:17:41.412+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-resource_vm.go:247: [ERROR] Clone *.vdi and *.vmdk to VM folder: exit status 1
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteState
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalApplyProvisioners
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalIf
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteState
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteDiff
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalApplyPost
2018/08/07 22:17:41 [ERROR] root: eval: *terraform.EvalApplyPost, err: 1 error(s) occurred:
* virtualbox_vm.node.1: exit status 1
2018/08/07 22:17:41 [ERROR] root: eval: *terraform.EvalSequence, err: 1 error(s) occurred:
* virtualbox_vm.node.1: exit status 1
2018/08/07 22:17:41 [TRACE] [walkApply] Exiting eval tree: virtualbox_vm.node[1]
2018-08-07T22:17:41.454+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-vbm.go:45: executing: VBoxManage clonehd /Users/name/.terraform/virtualbox/gold/virtualbox-ubuntu/ubuntu-xenial-16.04-cloudimg-configdrive.vmdk /Users/name/.terraform/virtualbox/machine/node-01/ubuntu-xenial-16.04-cloudimg-configdrive.vmdk
2018-08-07T22:17:41.516+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-resource_vm.go:247: [ERROR] Clone *.vdi and *.vmdk to VM folder: exit status 1
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteState
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalApplyProvisioners
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalIf
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteState
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalWriteDiff
2018/08/07 22:17:41 [TRACE] root: eval: *terraform.EvalApplyPost
2018/08/07 22:17:41 [ERROR] root: eval: *terraform.EvalApplyPost, err: 1 error(s) occurred:
* virtualbox_vm.node.0: exit status 1
2018/08/07 22:17:41 [ERROR] root: eval: *terraform.EvalSequence, err: 1 error(s) occurred:
* virtualbox_vm.node.0: exit status 1
2018/08/07 22:17:41 [TRACE] [walkApply] Exiting eval tree: virtualbox_vm.node[0]
2018/08/07 22:17:41 [TRACE] dag/walk: upstream errored, not walking "output.IPAddr_2"
2018/08/07 22:17:41 [TRACE] dag/walk: upstream errored, not walking "provider.virtualbox (close)"
2018/08/07 22:17:41 [TRACE] dag/walk: upstream errored, not walking "output.IPAddr"
2018/08/07 22:17:41 [TRACE] dag/walk: upstream errored, not walking "meta.count-boundary (count boundary fixup)"
2018/08/07 22:17:41 [TRACE] dag/walk: upstream errored, not walking "root"
2018/08/07 22:17:41 [TRACE] Preserving existing state lineage "782abaa9-e567-10d4-1902-6d1223713e6a"
2018/08/07 22:17:41 [TRACE] Preserving existing state lineage "782abaa9-e567-10d4-1902-6d1223713e6a"
2018/08/07 22:17:41 [TRACE] Preserving existing state lineage "782abaa9-e567-10d4-1902-6d1223713e6a"
2018/08/07 22:17:41 [TRACE] Preserving existing state lineage "782abaa9-e567-10d4-1902-6d1223713e6a"
2018/08/07 22:17:41 [DEBUG] plugin: waiting for all plugin processes to complete...
Error: Error applying plan:
2 error(s) occurred:
* virtualbox_vm.node[1]: 1 error(s) occurred:
* virtualbox_vm.node.1: exit status 1
* virtualbox_vm.node[0]: 1 error(s) occurred:
* virtualbox_vm.node.0: exit status 1
Terraform does not automatically rollback in the face of errors.
2018-08-07T22:17:41.522+0200 [DEBUG] plugin.terraform-provider-virtualbox: pid-3041-rpc_server.go:48: [ERR] plugin: plugin server: accept unix /var/folders/y4/v8w900l115lbtzylp143pxfr0000gn/T/plugin055999022: use of closed network connection
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.
What am I doing wrong? the example with an older image seems to work?
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