Systemd и python3

Стандартный конфиг сервиса:

[Unit]
Description=Backup
After=multi-user.target
[Service]
Type=simple
ExecStart=/usr/bin/bash -c "cd /root/EzBackUp && python3.8 EzBackUp.py"
[Install]
WantedBy=multi-user.target

Также пробовал: ExecStart=/root/EzBackUp/start.sh, в котором написано:
cd /root/EzBackUp && python3.8 EzBackUp.py

Ошибки:

# sudo systemctl status backup.service
● backup.service - Backup
   Loaded: loaded (/lib/systemd/system/backup.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Mon 2020-09-07 19:42:51 UTC; 9s ago
  Process: 19645 ExecStart=/usr/bin/bash -c cd /root/EzBackUp && python3.8 EzBackUp.py (code=exited, status=203/EXEC)
 Main PID: 19645 (code=exited, status=203/EXEC)

Sep 07 19:42:51 *** systemd[1]: Started Backup.
Sep 07 19:42:51 *** systemd[19645]: backup.service: Failed at step EXEC spawning /u
Sep 07 19:42:51 *** systemd[1]: backup.service: Main process exited, code=exited, s
Sep 07 19:42:51 *** systemd[1]: backup.service: Unit entered failed state.
Sep 07 19:42:51 *** systemd[1]: backup.service: Failed with result 'exit-code'.

Хотя при ручном запуске скрипта /root/EzBackUp/start.sh все работает исправно.
В чем ошибка?