Error when resizing private storage

Error: basic tab: Online resize of volume qubes_... failed: resize2fs: Permission denied to resize filesystem
Resize manually worked but what could be the cause?

  • Did you install Qubes OS over ext4 + lvm or btrfs?
  • Are you trying to shrink or enlarge the filesystem of the VM?
  • How did you resize it?
  • How did you ‘manually’ resize it?