Супорт работает? Не качает образ(возможно его нет?)

==> virtualbox-iso: Retrieving Guest additions

==> virtualbox-iso: Trying /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso

==> virtualbox-iso: Trying /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso

==> virtualbox-iso: /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso => /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso

==> virtualbox-iso: Retrieving ISO

==> virtualbox-iso: Trying iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso

==> virtualbox-iso: Trying iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso?checksum=sha256%3A7bcef5cf4475eae674f23f82e0f72d9cb5fe5dbc40d6f6ce76211b267617c856

==> virtualbox-iso: Download failed source path error: stat /Users/admin/Documents/projects_devops/test/packer-debian9/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso: no such file or directory

==> virtualbox-iso: Trying https://cdimage.debian.org/cdimage/archive/9.12.0/amd64/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso

==> virtualbox-iso: Trying https://cdimage.debian.org/cdimage/archive/9.12.0/amd64/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso?checksum=sha256%3A7bcef5cf4475eae674f23f82e0f72d9cb5fe5dbc40d6f6ce76211b267617c856

==> virtualbox-iso: Download failed bad response code: 404

==> virtualbox-iso: error downloading ISO: [source path error: stat /Users/admin/Documents/projects_devops/test/packer-debian9/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso: no such file or directory bad response code: 404]

Build ‘virtualbox-iso’ errored after 2 seconds 722 milliseconds: error downloading ISO: [source path error: stat /Users/admin/Documents/projects_devops/test/packer-debian9/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso: no such file or directory bad response code: 404]

==> Wait completed after 2 seconds 722 milliseconds

==> Some builds didn’t complete successfully and had errors:

→ virtualbox-iso: error downloading ISO: [source path error: stat /Users/admin/Documents/projects_devops/test/packer-debian9/iso-cd/debian-9.12.0-amd64-xfce-CD-1.iso: no such file or directory bad response code: 404]

Есть варианты решения?

Привет! Какой урок проходишь?

Это заложенная ошибка (задание на сообразительность).
https://cdimage.debian.org/cdimage/
В этом репозитории есть этот образ просто по другой ссылке. Тебе нужно его найти и подставить с sha суммой самостоятельно.