Why does my output deliver NaN/Cannot Read

[Colin]

Welcome to the forum @Twellow

Unfortunately you have not posted the flow in a way that we can use.

In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```)

``` 
   code goes here 
```

You can edit and correct your post by clicking the pencil icon.

See this post for more details - How to share code or flow json