Installation doesn't start

### What Happened?

After finishing the steps for preparing the installation, the installation didn't start. The log stayed empty as if nothing was happening.


### Steps to Reproduce

1. Go through the first few steps up to the installation type selection
2. Use the 'custom install' option, make the partitions using GParted and select the Boot and Root partitions
3. Start the installation

### Expected Behavior

The installer should proceed as it would usually.

### OS Version

8.x (Circe)

### OS Architecture

amd64 (on most hardwares)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

```shell

```

### Hardware Info

_The installation was attempted using the August 1st RC build._

Linux 6.14.0-27-generic

From System Settings:
Dual-Core Intel® Core(TM) i7-4600U CPU @ 2.10GHz
Intel® HD Graphics 4400
12 GB memory
256 GB storage (SATA SSD)