unsupported operand type(s) for +: 'NoneType' and 'str'

### Which ISO version are you using?

2024-11-01

### The installation log

```json
https://0x0.st/XnQe.log
```


### describe the problem

#### Description of the issue

I tried installing arch via archinstall and got following error:
unsupported operand type(s) for +: 'NoneType' and 'str'

Specs:
Ryzen 5900X
AMD RX 6800XT
32GB RAM
480GB SSD
