Element Nightly: Message search initialisation failing

### Steps to reproduce

1. Where are you starting? What can you see?
Element Nightly on Windows.

2. What do you click?
Settings > Security & Privacy > Reset message search

3. More steps…

### Outcome

#### What did you expect?
To successfully reset the Message search

#### What happened instead?
"Unknown error" appears


Bear in mind that the search works as expected on non-nightly Element.

### Operating system

Windows

### Application version

Every Element Nightly version from a year or so

### How did you install the app?

https://element.io/download

### Homeserver

_No response_

### Will you send logs?

Yes