List or Library control not working

I'm having issues getting the List or Library control to function. I have set these up in the past and for some reason it's not working.

I'm getting this strange error and can't figure out why.

i changed the "parent" field in the child database to the ID of the Parent list and now get this screen, but the "new" button does nothing when clicking on it.

so i change the edit from "inline" to "dialog" and after hitting "new", a dialog pops up that i value and hit save and it goes back to this error again.

Hi @eweiler,

This might be an issue with the target list. Could you try using a different list and recording a HAR log for us as you do?

Hi @eweiler,

Please re-add the parent field to the form with a different name (for example, Parent starting with a capital letter). The name parent currently conflicts with an internal variable of the List or Library control.

Thank you, that worked!