Easy Install fails on Ubuntu 16.04

I purchased 1 VPS servers .

All apt-get update apt-get upgrade Ubuntu v20.04 at the same time

Started installing ERPNext (v13.1.1) using the easy install method (followed these steps from new user):

export LC_ALL=C.UTF-8

sudo apt install python3-minimal build-essential python3-setuptools

wget https://raw.githubusercontent.com/frappe/bench/develop/install.py

sudo python3 install.py --verbose --production --user erp_jmi --mariadb-version 10.5 --frappe-branch version-13 --erpnext-branch version13

installs failed this !!!

I even tried installing on another VPS Ubunutu 20.04on another provider and it fails also.

Something changed in the install functions . Here is the traceback (identical for all the failed installs):

root@Nxeterp:~# sudo python3 install.py --verbose --production --user erp_jmi --mariadb-version 10.5 --frappe-branch version-13 --erpnext-branch version13
Get:1 Index of /ubuntu/ xenial InRelease [247 kB]
Hit:2 Index of /ubuntu xenial-security InRelease
Hit:3 Index of /ubuntu/ xenial-updates InRelease
Hit:4 Index of /ubuntu/ xenial-backports InRelease
Fetched 247 kB in 0s (346 kB/s)
Reading package lists… Done
Reading package lists… Done
Building dependency tree
Reading state information… Done
build-essential is already the newest version (12.1ubuntu2).
libffi-dev is already the newest version (3.2.1-4).
python3-dev is already the newest version (3.5.1-3).
python3-setuptools is already the newest version (20.7.0-1).
git is already the newest version (1:2.7.4-0ubuntu1.10).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
curl already installed!
wget already installed!
git already installed!
pip3 already installed!
Traceback (most recent call last):
File “/usr/lib/python3.5/runpy.py”, line 184, in _run_module_as_main
main”, mod_spec)
File “/usr/lib/python3.5/runpy.py”, line 85, in _run_code
exec(code, run_globals)
File “/usr/local/lib/python3.5/dist-packages/pip/main.py”, line 29, in
from pip._internal.cli.main import main as _main
File “/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py”, line 58
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
Traceback (most recent call last):
File “install.py”, line 493, in
install_prerequisites()
File “install.py”, line 174, in install_prerequisites
‘python3’: “sudo -H python3 -m pip install --upgrade pip setuptools-rust”
File “install.py”, line 141, in run_os_command
returncode = subprocess.check_call(command, shell=True, stdout=log_stream, s tderr=sys.stderr)
File “/usr/lib/python3.5/subprocess.py”, line 581, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command ‘sudo -H python3 -m pip install --upgrade pip setuptools-rust’ returned non-zero exit status 1