substring-after in Xpath filter

### Expected Behavior

I try to set a filter for a tag. I have a url and I want to use substring-after to get a specific part of it.

I'm using this string

`substring-after(/*/*/@href, "rollouts/")`

and it is valid regarding xpather.com

### Actual Behavior

What I get is the error message.

`TypeError: H.filter is not a function`


I think it's not a bug but I'm missing something. Can anyone help?

### Reproduction Steps

_No response_

### Is there an existing issue for this?

- [X] I have searched the [issue tracker](https://www.github.com/Kong/insomnia/issues) for this problem.

### Additional Information

_No response_

### Insomnia Version

8.20

### What operating system are you using?

macOS

### Operating System Version

macOS 14.0

### Installation method

updated in insomnia

### Last Known Working Insomnia version

_No response_

Start by reproducing the XPath filter from the report in Insomnia 8.20, using `substring-after(/*/*/@href, "rollouts/")`, and capture the `TypeError: H.filter is not a function` failure. Compare the behavior with a simpler tag filter and establish the expected result before identifying the relevant filter-handling entry point.

Written by the indexing model from the issue text.