GET/fixed-index:404 Not Found:Path not Found

It may just be that your installation is not yet up to date. Please post the output of the following two commands:
Code:
pveversion -v

proxmox-backup-client version
 
It may just be that your installation is not yet up to date. Please post the output of the following two commands:
Code:
pveversion -v

proxmox-backup-client version
pveversion -v
proxmox-ve: 6.2-1 (running kernel: 5.4.41-1-pve)
pve-manager: 6.2-4 (running version: 6.2-4/9824574a)
pve-kernel-5.4: 6.2-2
pve-kernel-helper: 6.2-2
pve-kernel-5.4.41-1-pve: 5.4.41-1
pve-kernel-5.4.34-1-pve: 5.4.34-2
ceph: 14.2.9-pve1
ceph-fuse: 14.2.9-pve1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 2.0.1-1+pve8
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libproxmox-acme-perl: 1.0.4
libpve-access-control: 6.1-1
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.1-2
libpve-guest-common-perl: 3.0-10
libpve-http-server-perl: 3.0-5
libpve-network-perl: 0.4-4
libpve-storage-perl: 6.1-8
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.2-1
lxcfs: 4.0.3-pve2
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.2-1
pve-cluster: 6.1-8
pve-container: 3.1-6
pve-docs: 6.2-4
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.1-2
pve-firmware: 3.1-1
pve-ha-manager: 3.0-9
pve-i18n: 2.1-2
pve-qemu-kvm: 5.0.0-2
pve-xtermjs: 4.3.0-1
qemu-server: 6.2-2
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.4-pve1
root@sccpve1:~# proxmox-backup-client version
client version: 0.8.6
 
pve-manager: 6.2-4 (running version: 6.2-4/9824574a)
pve-qemu-kvm: 5.0.0-2
qemu-server: 6.2-2

Yes, those are outdated and cannot work. Ensure you got valid packages repositories setup (see https://pve.proxmox.com/wiki/Package_Repositories ) and upgrade to the latest available packages.

You'd need at least the following set:
Code:
pve-manager: 6.2-9
pve-qemu-kvm: 5.0.0-9
qemu-server: 6.2-8

Or newer.
 
My backup was running all the time, but I also get this message since today:

INFO: starting new backup job: vzdump 112 --mode snapshot --node pve --remove 0 --storage Storage --compress zstd
INFO: Starting Backup of VM 112 (qemu)
INFO: Backup started at 2020-08-21 10:21:31
INFO: status = running
INFO: VM Name: PfSense
INFO: include disk 'scsi0' 'NVME:vm-112-disk-0' 100G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating pbs archive on storage 'Storage'
ERROR: VM 112 qmp command 'backup' failed - backup register image failed: command error: HTTP Error 404 Not Found: Path '/fixed_index' not found.
ERROR: Backup of VM 112 failed - VM 112 qmp command 'backup' failed - backup register image failed: command error: HTTP Error 404 Not Found: Path '/fixed_index' not found.
INFO: Failed at 2020-08-21 10:21:31
INFO: Backup job finished with errors
TASK ERROR: job errors


I have just updated and upgraded my proxmox and proxmox-backup servers and rebooted.

The containers works, but the vm don't work.

**
# pveversion -v
proxmox-ve: 6.2-1 (running kernel: 5.4.55-1-pve)
pve-manager: 6.2-4 (running version: 6.2-4/9824574a)
pve-kernel-5.4: 6.2-5
pve-kernel-helper: 6.2-5
pve-kernel-5.4.55-1-pve: 5.4.55-1
pve-kernel-5.4.44-2-pve: 5.4.44-2
pve-kernel-5.4.34-1-pve: 5.4.34-2
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libproxmox-acme-perl: 1.0.3
libpve-access-control: 6.1-1
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.1-2
libpve-guest-common-perl: 3.0-10
libpve-http-server-perl: 3.0-5
libpve-storage-perl: 6.1-7
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.2-1
lxcfs: 4.0.3-pve2
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.2-11
pve-cluster: 6.1-8
pve-container: 3.1-5
pve-docs: 6.2-4
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.1-2
pve-firmware: 3.1-2
pve-ha-manager: 3.0-9
pve-i18n: 2.1-2
pve-qemu-kvm: 5.0.0-2
pve-xtermjs: 4.7.0-1
qemu-server: 6.2-2
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.4-pve1

# proxmox-backup-client version
client version: 0.8.11
 
Last edited: