Ansible vmware_guest cannot ssh into vmware vSphere vCenter

I'm trying to setup a virtual machine with ansible. However, ansible keeps getting stuck on the Deploy guest from template task.

Using -vvv, I got the following logs.

When attempting to log in via ssh pubkey auth:

TASK [Deploy guest from template]

task path: /home/wilb/Development/vcenter_demo/vcenter_demo.yml:12
Using module file /usr/lib/python2.7/site-packages/ansible/modules/cloud/vmware/vmware_guest.py
<vcenter.mycompany.com> ESTABLISH SSH CONNECTION FOR USER: root
<vcenter.mycompany.com> SSH: EXEC ssh -C -o ControlMaster=auto 
  -o ControlPersist=60s -o KbdInteractiveAuthentication=no 
  -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey 
  -o PasswordAuthentication=no -o User=root -o ConnectTimeout=10 
  -o ControlPath=/home/wilb/.ansible/cp/982c3c15ab 
  vcenter.mycompany.com '/bin/sh -c '"'"'echo ~ && sleep 0'"'"''

When I try to use --ask-pass, it gets stuck here:

TASK [Deploy guest from template] *******************************************************************************************************
task path: /home/wilb/Development/vcenter_demo/vcenter_demo.yml:14
Using module file /usr/lib/python2.7/site-packages/ansible/modules/cloud/vmware/vmware_guest.py
<vcenter.mycompany.com> ESTABLISH SSH CONNECTION FOR USER: root
<vcenter.mycompany.com> SSH: EXEC sshpass -d12 ssh -C 
  -o ControlMaster=auto -o ControlPersist=60s -o User=root 
  -o ConnectTimeout=10 
  -o ControlPath=/home/wilb/.ansible/cp/982c3c15ab 
  vcenter.mycompany.com '/bin/sh -c '"'"'echo ~ && sleep 0'"'"''

I can login to the vCenter manually. However, to access the shell, I first have to type: "shell" in the vCenter; by default it's some weird customized prompt.

How can I get ansible to log into vcenter properly to automatically deploy a VM?

System