Installation Error: securedrop fails on servers on Proxmox VMs

My setup is as follows; Application server and Monitor Server are VMs on Proxmox Hypervisor. VM Operating system is Ubuntu 20.04

My Admin Workstation is a laptop running tails from USB.

What am I missing in my setup?

Installation error is below:

TASK [grsecurity : Remove MOTD pam module from SSH logins.] *******************************************************************************************************************************************************
ok: [mon]
ok: [app]

TASK [grsecurity : Install the grsecurity-patched kernel from the FPF repo.] **************************************************************************************************************************************
fatal: [mon]: FAILED! => {"changed": false, "msg": "async task did not complete within the requested time - 500s"}
fatal: [app]: FAILED! => {"changed": false, "msg": "async task did not complete within the requested time - 500s"}

NO MORE HOSTS LEFT ************************************************************************************************************************************************************************************************

NO MORE HOSTS LEFT ************************************************************************************************************************************************************************************************

PLAY RECAP ********************************************************************************************************************************************************************************************************
app                        : ok=16   changed=1    unreachable=0    failed=1    skipped=8    rescued=0    ignored=0   
localhost                  : ok=11   changed=0    unreachable=0    failed=0    skipped=2    rescued=0    ignored=0   
mon                        : ok=16   changed=1    unreachable=0    failed=1    skipped=6    rescued=0    ignored=0   

Traceback (most recent call last):
  File "/home/amnesia/Persistent/securedrop/admin/.venv3/bin/securedrop-admin", line 7, in <module>
    exec(compile(f.read(), __file__, 'exec'))
  File "/home/amnesia/Persistent/securedrop/admin/bin/securedrop-admin", line 22, in <module>
    main(sys.argv[1:])
  File "/home/amnesia/Persistent/securedrop/admin/securedrop_admin/__init__.py", line 1195, in main
    return_code = args.func(args)
  File "/home/amnesia/Persistent/securedrop/admin/securedrop_admin/__init__.py", line 762, in wrapper
    return func(*args, **kwargs)
  File "/home/amnesia/Persistent/securedrop/admin/securedrop_admin/__init__.py", line 843, in install_securedrop
    cwd=args.ansible_path
  File "/usr/lib/python3.7/subprocess.py", line 347, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/home/amnesia/Persistent/securedrop/install_files/ansible-base/securedrop-prod.yml', '--ask-become-pass']' returned non-zero exit status 2.