the status of nodes is unkown,how i address it

First guess: check pvestatd:
Code:
~# systemctl status pvestatd.service 
● pvestatd.service - PVE Status Daemon
     Loaded: loaded (/lib/systemd/system/pvestatd.service; enabled; preset: enabled)
     Active: active (running) since Fri 2024-02-23 13:44:57 CET; 1 week 2 days ago
Restart it if it is not "active (running)".