Potential bug: handling of failed simulator in learner

### Description

L166 on base.py of `autoemulate/learners/`

### Reproduction steps

```bash
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
```

### Version

N/A

### Screenshots

```bash
![DESCRIPTION](LINK.png)
```

### OS

_No response_