Issue when importing database from Excel in AB beta

### What do you want to report?

Hello, when I try to import a database from a Excel in bw25 format. I get this error

<img width="530" height="193" alt="Image" src="https://github.com/user-attachments/assets/6d2aa9ea-1cb3-47c1-a637-27ddd3be961e" />

### Relevant errors

```python

```

### Version

3.0.0b1169

### Installation method

PyPI (pip)

### Operating system

Windows 11