@olivierlambert I even saw your video yesterday but have missed that one...

As XO is using npm I wonder after reading this: https://thehackernews.com/2026/04/google-attributes-axios-npm-supply.html

Is there something we need to check/do...

@hoh This is SOOO long in the tooth........... Always was annoying. Thx for findinf a fix, looking forward to it.

@stormi didn't see that (my old eyes)... guessed so anyway

@gduperrey reboot necessary?

@conitrade-as Yes, fixed. Thx!

The issue on this VM was we were installing as non-admin. All others were admin by default.

Good catch

@dinhngtu

@dinhngtu

@dinhngtu Noting there:

@dinhngtu We have one Win11 in production, which dodn't install the new tools, running the previous ones.

We always get:

We have rebooted before installing the tools: same issue
We have run Xenclean before installing: same
We have run Xenbootfix: same

Basically we'tried everything. I haven't opened an official ticket yet because the answer here might help others.

@dinhngtu Upgraded from previous tools (big jump from citrix was already done ) @home and @office a dozen Windows11 and Windows Server 2022.
No issues.

@dom0 As said numerous times by the developers: XCPNG Center is not supported. You have to use XO/XOA.

@ph7 This I can confirm, with XO VM.
But discussion was about the host....

@robertblissitt Press ESC and you'll see what's happening

@gduperrey Updated 2 pools/2 hosts @home (via cli). 3 pools/5 hosts @office (via RPU).
No issue.

Confirmed. Backups run successfully again.

@simonp NFS and S3

Updated XO to Master, commit a3139 and now the backups are failing.
Log sample:

  "tasks": [
    {
      "data": {
        "type": "VM",
        "id": "11393959-0b52-7c05-7b02-3fe6d645256d",
        "name_label": "XO"
      },
      "id": "1771281894926",
      "message": "backup VM",
      "start": 1771281894926,
      "status": "failure",
      "tasks": [
        {
          "id": "1771281894938:0",
          "message": "clean-vm",
          "start": 1771281894938,
          "status": "success",
          "end": 1771281895646,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1771281897732:0",
          "message": "snapshot",
          "start": 1771281897732,
          "status": "success",
          "end": 1771281912046,
          "result": "6ab9cc35-95c2-0139-d996-7beafced8d6b"
        },
        {
          "data": {
            "id": "5f5c2608-bd80-4682-addc-dab062e9962c",
            "isFull": false,
            "type": "remote"
          },
          "id": "1771281912060",
          "message": "export",
          "start": 1771281912060,
          "status": "failure",
          "tasks": [
            {
              "id": "1771281916065",
              "message": "transfer",
              "start": 1771281916065,
              "status": "success",
              "end": 1771282018684,
              "result": {
                "size": 6650068992
              }
            },
            {
              "id": "1771282024895",
              "message": "clean-vm",
              "start": 1771282024895,
              "status": "failure",
              "tasks": [
                {
                  "id": "1771282027367",
                  "message": "merge",
                  "start": 1771282027367,
                  "status": "failure",
                  "end": 1771282031803,
                  "result": {
                    "code": "NOT_SUPPORTED",
                    "message": "Can't init vhd directory without using alias",
                    "name": "Error",
                    "stack": "Error: Can't init vhd directory without using alias\n    at RemoteVhdDisk.init (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/disks/RemoteVhdDisk.mjs:78:31)\n    at async _mergeVhdChain (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/_cleanVm.mjs:75:5)"
                  }
                }
              ],
              "end": 1771282031803,
              "result": {
                "code": "NOT_SUPPORTED",
                "message": "Can't init vhd directory without using alias",
                "name": "Error",
                "stack": "Error: Can't init vhd directory without using alias\n    at RemoteVhdDisk.init (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/disks/RemoteVhdDisk.mjs:78:31)\n    at async _mergeVhdChain (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/_cleanVm.mjs:75:5)"
              }
            }
          ],
          "end": 1771282031850
        }
      ],
      "infos": [
        {
          "message": "Transfer data using NBD"
        }
      ],
      "end": 1771282031856
    },
    {
      "data": {
        "type": "VM",
        "id": "fb7c36ab-2f26-b049-6fcd-2dfcabd37361",
        "name_label": "Windows 11"
      },
      "id": "1771281894928",
      "message": "backup VM",
      "start": 1771281894928,
      "status": "failure",
      "tasks": [
        {
          "id": "1771281894938",
          "message": "clean-vm",
          "start": 1771281894938,
          "status": "success",
          "end": 1771281895970,
          "result": {
            "merge": false
          }
        },
        {
          "id": "1771281897733",
          "message": "snapshot",
          "start": 1771281897733,
          "status": "success",
          "end": 1771281898773,
          "result": "3ce54f0c-8fa4-d71f-7693-8cf0c5c5a004"
        },
        {
          "data": {
            "id": "5f5c2608-bd80-4682-addc-dab062e9962c",
            "isFull": true,
            "type": "remote"
          },
          "id": "1771281898774",
          "message": "export",
          "start": 1771281898774,
          "status": "failure",
          "tasks": [
            {
              "id": "1771281900165",
              "message": "transfer",
              "start": 1771281900165,
              "status": "success",
              "end": 1771282339491,
              "result": {
                "size": 68675436544
              }
            },
            {
              "id": "1771282341068",
              "message": "clean-vm",
              "start": 1771282341068,
              "status": "failure",
              "tasks": [
                {
                  "id": "1771282341203",
                  "message": "merge",
                  "start": 1771282341203,
                  "status": "failure",
                  "end": 1771282345026,
                  "result": {
                    "code": "NOT_SUPPORTED",
                    "message": "Can't init vhd directory without using alias",
                    "name": "Error",
                    "stack": "Error: Can't init vhd directory without using alias\n    at RemoteVhdDisk.init (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/disks/RemoteVhdDisk.mjs:78:31)\n    at async _mergeVhdChain (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/_cleanVm.mjs:75:5)"
                  }
                }
              ],
              "end": 1771282345026,
              "result": {
                "code": "NOT_SUPPORTED",
                "message": "Can't init vhd directory without using alias",
                "name": "Error",
                "stack": "Error: Can't init vhd directory without using alias\n    at RemoteVhdDisk.init (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/disks/RemoteVhdDisk.mjs:78:31)\n    at async _mergeVhdChain (file:///opt/xo/xo-builds/xen-orchestra-202602162239/@xen-orchestra/backups/_cleanVm.mjs:75:5)"
              }
            }
          ],
          "end": 1771282345027
        }
      ],
      "infos": [
        {
          "message": "Transfer data using NBD"
        }
      ],

reverting back to commit a3139 and all is well again

Answering myself:

@dinhngtu downloaded on a windows server 2022, extracted and did the inf install. No visual feedback.
How do I know it was installed?