Why does Ansible Automation Platform UI login fail with an error 502 Bad Gateway nginx?

Issue

• Unable to log in to the Ansible Automation platform Web UI and getting an error message 502 Bad Gateway nginx.

• Rerunning the setup script results in the following error.

  TASK [ansible.automation_platform_installer.preflight : Preflight check - check license type] ***
  fatal: [somehost.org]: FAILED! => {"changed": true, "cmd": "awx-manage check_license", "delta": "0:00:00.004448", "end": "2023-08-22 20:19:02.493105", "msg": "non-zero return code", "rc": 126, "start": "2023-08-22 20:19:02.488657", "stderr": "/bin/sh: /bin/awx-manage: /var/lib/awx/venv/awx/bin/python: bad interpreter: No such file or directory", "stderr_lines": ["/bin/sh: /bin/awx-manage: /var/lib/awx/venv/awx/bin/python: bad interpreter: No such file or directory"], "stdout": "", "stdout_lines": []}