Cannot query node api from other node

Hello,

one of our proxmox cluster has a problem to query api status of other nodes:

node01
pvesh get /nodes/node01/status - works
pvesh get /nodes/node02/status - works

node02
pvesh get /nodes/node01/status - not working
pvesh get /nodes/node02/status - works

Can someone explain, why? I tried to restart some services, but this did not fixed it.

Best regards,
aro