Save HA Backup (Proxmox Installation)

Hello,
I installed my HA via Proxmox. At the moment I can not start HA. One Solution would be to reset the whole machine (I made some mistakes the first time I setup the system).
But I would like to save a Backup from inside HA. Is there a possibility to reach the backups from outside the HAOS?

Thanks in Advance

If HA is not started at all, then it will be hard.
If HA can start, but you can just not get to it through the webpage, then there is hope.

A running HA’s CLI should be reachable through the console on the machine itself.
Proxmox have an option to see the VMs console.
Type help at the HA prompt for possibilities within the HA system.
Type login at the HA prompt to get to the underlying Alpine Linux OS to do more general Linux actions.

You need to clarify if the VM OS will start, and not the HA application, or if the OS won’t start at all. If the OS starts you can go into the console and find the backup location. Saving the file will be a bit of a challenge but it will be possible.