When started KVM VPS from Proxmox web interface, it show Stopped status. When checking details on "Task History" tab in Proxmox, i see TASK error

# qm start 100
Could not access KVM kernel module: Is a directory
failed to initialize KVM: Is a directory
start failed: command '/usr/bin/kvm -id 100 -chardev 'socket,id=qmp,path=/var/run/qemu-server/100.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -vnc unix:/var/run/qemu-server/100.vnc,x09,password -pidfile /var/run/qemu-server/100.pid -daemonize -name my.server.com -smp 'sockets=1,cores=4' -nodefaults -boot 'menu=on' -vga cirrus -cpu kvm64,+x2apic,+sep -k en-us -m 2048 -evice 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device 'usb-tablet,id=tablet,bus=uhci.0,port=1' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -drive 'file=/var/lib/vz/tmplate/iso/disc1.iso,if=none,id=drive-ide2,media=cdrom,aio=native' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200' -drive'file=/var/lib/vz/images/100/vm-100-disk-1.qcow2,if=none,id=drive-ide0,format=qcow2,iops_rd=80,iops_wr=80,aio=native ,cache=none' -device 'ide-hd,bus=ide.0,unit=0,drive=drive-ide0,id=ide0,botindex=100' -netdev 'type=tap,id=net0,ifname=tap100i0,script=/var/lib/qemu-server/pve-bridge' -device 'e1000,mac=A6:99:97:3F:CB:B7,netdev=net0,bus=pci.0 ,addr=0x12,id=net0,bootindex=300'' faled: exit code 1
What helped is to go to Proxmox web interface, doubleclick my VM (100), go to "Options" tab and set "KVM hardware virtualization" to No