Error on Ubuntu Server 24.04.1 LTS (RPI4): pex ImportError

[JustAnEric]

Fresh Ubuntu Server install with updated package lists and latest upgrades. Displayed on my Kali Linux instance also with fresh installs.
Ran on a Raspberry Pi 4.
Used the install agent provided on the Dataplicity website.

sudo supervisorctl tail tuxtunnel displays:

ort Version
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/pep_440.py", line 17, in <module>
    from pex.third_party import attr
ImportError: cannot import name 'attr' from 'pex.third_party' (/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/third_party/__init__.py)
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88 in _run_code
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/__main__.py", line 85, in <module>
    from pex.pex_bootstrapper import bootstrap_pex
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/pex_bootstrapper.py", line 12, in <module>
    from pex.environment import ResolveError
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/environment.py", line 12, in <module>
    from pex import dist_metadata, pex_warnings, targets
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/dist_metadata.py", line 25, in <module>
    from pex.pep_440 import Version
  File "/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/pep_440.py", line 17, in <module>
    from pex.third_party import attr
ImportError: cannot import name 'attr' from 'pex.third_party' (/home/dataplicity/.pex/unzipped_pexes/0ead05278ab3d54afe6c974e5470f83061f0e860/.bootstrap/pex/third_party/__init__.py)

From cat /etc/os-release: (not complete file)

PRETTY_NAME="Ubuntu 24.04.1 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.1 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian

From sudo supervisorctl tail tuxtunnel:

tuxtunnel        FATAL    Exited too quickly (process log may have details)