> libqb: unix.c:79 [3] couldn't open file /dev/shm/: Is a directory (21) > libqb: unix.c:85 [3] couldn't open file /var/run/: Is a directory (21) > libqb: ipc_us.c:431 [3] couldn't open file for mmap: Success (0) looks something is wrong with libqb. Does it help if you restart pve-cluster service?