Unable to install 7.0 release

### What Happened?

I'm trying to install release 7.0 Horus but neither UEFI nor BIOS mode generates a working installation.

### UEFI
The installation seems to be fine but the BIOS is unable to find a boot entry.
```
$ sudo bootctl list --esp-path /mnt
No boot loader entries found.
```
The directory contains `EFI/ubuntu/...` and `EFI/BOOT/...` with many `.efi` files.

### BIOS
The installation crashes with something like this: https://superuser.com/questions/903112/grub2-install-this-gpt-partition-label-contains-no-bios-boot-partition.
I tried to edit the partition labels with gedit but didn't find the correct one to satisfy this step.

### Steps to Reproduce

1. write iso to usb stick
2. advanced installation
3. select /dev/sda1 as boot partition
4. select /dev/sda2 as root partition

### Expected Behavior

any of the boot environments should create a working installation

### OS Version

7.x (Early Access)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

_No response_