Updated test VM on Proxmox:
All ervices running.
grep -E '(error|fail|ERROR|FAIL)' /var/log/boot.log
[DEPEND] Dependency failed for Network Manager Wait Online.
grep -E '(error|fail|ERROR|FAIL)' /var/log/messages
Dec 4 13:18:14 neth-test kernel: acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
Dec 4 13:18:14 neth-test kernel: acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
Dec 4 13:18:18 neth-test augenrules: failure 1
Dec 4 13:18:18 neth-test augenrules: failure 1
Dec 4 13:18:18 neth-test systemd: Dependency failed for Network Manager Wait Online.
Dec 4 13:18:18 neth-test systemd: Job NetworkManager-wait-online.service/start failed with result 'dependency'.
Dec 4 13:18:28 neth-test unbound-checkconf: unbound-checkconf: no errors in /etc/unbound/unbound.conf
Dec 4 13:18:29 neth-test kernel: xt_ndpi: module verification failed: signature and/or required key missing - tainting kernel