Errors after ./cli.py edit-settings

[HNeumeier]

Hello i downloaded the Package and the i get the following errors, may you can help me, Thanks

root@raspimessen /opt/fhem/bin/inverter-connect # ./cli.py edit-settings
Create virtual env here: /opt/fhem/bin/inverter-connect/.venv-app
The virtual environment was not created successfully because ensurepip is not
available. On Debian/Ubuntu systems, you need to install the python3-venv
package using the following command.

apt-get install python3-venv

You may need to use sudo with that command. After installing the python3-venv
package, recreate your virtual environment.

Failing command: ['/opt/fhem/bin/inverter-connect/.venv-app/bin/python3', '-Im', 'ensurepip', '--upgrade', '--default-pip']

root@raspimessen /opt/fhem/bin/inverter-connect # apt-get install python3-venv
Paketlisten werden gelesen… Fertig
Abhängigkeitsbaum wird aufgebaut… Fertig
Statusinformationen werden eingelesen… Fertig
python3-venv ist schon die neueste Version (3.9.2-3).
Das folgende Paket wurde automatisch installiert und wird nicht mehr benötigt:
libjs-node-uuid
Verwenden Sie »apt autoremove«, um es zu entfernen.
0 aktualisiert, 0 neu installiert, 0 zu entfernen und 0 nicht aktualisiert.
root@raspimessen /opt/fhem/bin/inverter-connect # ./cli.py edit-settings

• /opt/fhem/bin/inverter-connect/.venv-app/bin/python -m pip install -U pip-tools

/opt/fhem/bin/inverter-connect/.venv-app/bin/python: No module named pip
Traceback (most recent call last):
File "/opt/fhem/bin/inverter-connect/./cli.py", line 115, in
main(sys.argv)
File "/opt/fhem/bin/inverter-connect/./cli.py", line 97, in main
verbose_check_call(PYTHON_PATH, '-m', 'pip', 'install', '-U', 'pip-tools')
File "/opt/fhem/bin/inverter-connect/./cli.py", line 81, in verbose_check_call
return subprocess.check_call(popen_args)
File "/usr/lib/python3.9/subprocess.py", line 373, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '(PosixPath('/opt/fhem/bin/inverter-connect/.venv-app/bin/python'), '-m', 'pip', 'install', '-U', 'pip-tools')' returned non-zero exit status 1.