Index on a Computed Column(using udf)

I am trying to create a computed column using a udf. I keep hitting the cannot be persisted because the column does user or system data access, when i try creating a index for that column or even for trying to make the column persisted.

This is the udf func i am using :

CREATE FUNCTION x.bal(@ID NVARCHAR(128))RETURNS DECIMAL WITH SCHEMABINDINGAS BEGINDECLARE @SUM DECIMAL ;    WITH CTE AS (    SELECT ROW_NUMBER() OVER (ORDER BY date ASC, type DESC) AS ROWNUMBER,[Id]     T_id    FROM x.entries    )    SELECT @SUM = (SELECT SUM(AMOUNT) FROM CTE L1    WHERE L1.B_ID = L2.B_ID  AND L1.DATE <= L2.DATE AND L1.ROWNUMBER<L2.ROWNUMBER)    FROM CTE L2    WHERE L2.ID = @ID    RETURN @SUMENDGO 

to add the column :

ALTER TABLE x.EntriesADD bal AS dbo.bal(id) CREATE INDEX IDX_bal ON x.Entries(bal)

I have also found that the error is only on 2017 local sql server where as for Azure sql ,I see the following :If I run the Column Property check before creating the index, it works but if missed, it fails.