Query references other queries or steps, so it may not directly access a data source

I tried removing the holiday component as a parameter in the function and hard-coding a reference to the list object:

I tested it, and the function itself works--I was able to get the correct values by inputting test start and end dates.  However, when I use the function in my main query (again, passing only the start and end dates), I still get the "references other queries" error.

I may have to just stick with the combo method (calling the SharePoint list of holidays directly in my main query) or try calculating the delta in a DAX measure.