Power Query Function: functiionGetNamedRange appears to be not working

I have a function, obtained from the internet, that uses data from and Excel named range, allowing me to change the range value and refresh the query using the new/updated parameter entered in the named range.  The function is named: GetNamedRange and is written as follows:

let GetNamedRange=(NamedRange) =>

let
    name = Excel.CurrentWorkbook(){[Name=NamedRange]}[Content],
    value = name{0}[Column1]
in
    value

in GetNamedRange

One of the lines in my Advanced Editor works and is written:

#"Filtered Rows1" = Table.SelectRows(#"Filtered Rows", each [PRCS_PER_YM] = "202110"),

I want to replace the "202110" value in the above line with the data entered into my range named: rng_YYYYMM.

I modified the line above as follows:

#"Filtered Rows1" = Table.SelectRows(#"Filtered Rows", each [PRCS_PER_YM] = functionGetNamedRange("rng_YYYYMM")),

Currently, the range contains the same text value that was in the code, i.e., the text value of the range: rng_YYYYMM is 202110
Prior to changing, the query would refresh in about 1 miinute.  Now, unfortunately, it reads through the entire database of over a billion records and ... well, it never finishes .... it just runs, and runs, and runs.
I've used this function many times in the past and it work GREAT at allowing me to simply change the range value and "Refresh" the query.  Why is it not working now ... HELP.