Install crashes with RuntimeError: failed to find interpreter for Builtin discover of python_spec='python3'

[Wozzagonebush]

What's Wrong

Edited the setup script to use pip 2.7

Running the online setup, "crashes" at:

"Setting up virtual environment...
RuntimeError: failed to find interpreter for Builtin discover of python_spec='python3'"

Environment Info

RPi Model:
Pi Zero W
OS Release:
Linux raspberrypi 5.10.17+ #1414 Fri Apr 30 13:16:27 BST 2021 armv6l GNU/Linux

PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"

Service Status:

Unit garagepi.service could not be found.

Attach Logs

-------------------

Installing GaragePi

Updating packages...
Hit:1 http://raspbian.raspberrypi.org/raspbian buster InRelease
Hit:2 http://archive.raspberrypi.org/debian buster InRelease
Reading package lists...
Installing pip...
Collecting pip<21.0
Using cached pip-20.3.4-py2.py3-none-any.whl (1.5 MB)
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 20.3.4
Uninstalling pip-20.3.4:
Successfully uninstalled pip-20.3.4
Successfully installed pip-20.3.4

Installing virtualenv...
Requirement already satisfied: virtualenv in /usr/local/lib/python2.7/dist-packages (20.4.6)
Requirement already satisfied: importlib-resources>=1.0; python_version < "3.7" in /usr/local/lib/python2.7/dist-packages (from virtualenv) (3.3.1)
Requirement already satisfied: filelock<4,>=3.0.0 in /usr/local/lib/python2.7/dist-packages (from virtualenv) (3.0.12)
Requirement already satisfied: importlib-metadata>=0.12; python_version < "3.8" in /usr/local/lib/python2.7/dist-packages (from virtualenv) (2.1.1)
Requirement already satisfied: distlib<1,>=0.3.1 in /usr/local/lib/python2.7/dist-packages (from virtualenv) (0.3.1)
Requirement already satisfied: appdirs<2,>=1.4.3 in /usr/local/lib/python2.7/dist-packages (from virtualenv) (1.4.4)
Requirement already satisfied: six<2,>=1.9.0 in /usr/local/lib/python2.7/dist-packages (from virtualenv) (1.16.0)
Requirement already satisfied: pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32" in /usr/local/lib/python2.7/dist-packages (from virtualenv) (2.3.5)
Requirement already satisfied: contextlib2; python_version < "3" in /usr/local/lib/python2.7/dist-packages (from importlib-resources>=1.0; python_version < "3.7"->virtualenv) (0.6.0.post1)
Requirement already satisfied: typing; python_version < "3.5" in /usr/local/lib/python2.7/dist-packages (from importlib-resources>=1.0; python_version < "3.7"->virtualenv) (3.10.0.0)
Requirement already satisfied: singledispatch; python_version < "3.4" in /usr/local/lib/python2.7/dist-packages (from importlib-resources>=1.0; python_version < "3.7"->virtualenv) (3.6.1)
Requirement already satisfied: zipp>=0.4; python_version < "3.8" in /usr/local/lib/python2.7/dist-packages (from importlib-resources>=1.0; python_version < "3.7"->virtualenv) (1.2.0)
Requirement already satisfied: configparser>=3.5; python_version < "3" in /usr/local/lib/python2.7/dist-packages (from importlib-metadata>=0.12; python_version < "3.8"->virtualenv) (4.0.2)
Requirement already satisfied: scandir; python_version < "3.5" in /usr/local/lib/python2.7/dist-packages (from pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32"->virtualenv) (1.10.0)

Setting up virtual environment...
RuntimeError: failed to find interpreter for Builtin discover of python_spec='python3'