Istallation failed

Hi all I’m trying to install erpnext with command sudo python3 install.py --product
but following error occurs:

Traceback (most recent call last):
File “install.py”, line 500, in
install_bench(args)
File “install.py”, line 281, in install_bench
run_playbook(‘site.yml’, sudo=True, extra_vars=extra_vars)
File “install.py”, line 416, in run_playbook
success = subprocess.check_call(args, cwd=playbooks_folder, stdout=log_stream, stderr=sys.stderr)
File “/usr/lib/python3.8/subprocess.py”, line 364, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command ‘[‘ansible-playbook’, ‘-c’, ‘local’, ‘site.yml’, ‘-vvvv’, ‘-e’, ‘@/tmp/extra_vars.json’, ‘–become’, ‘–become-user=erp_administrator’]’ returned non-zero exit status 2.

can someone help me to solve the problem?
thank you very much in advance

Got the same problem.

New Ubuntu 20.04 installation, followed the guide line here: https://github.com/frappe/bench/blob/develop/docs/easy_install.md