There is mold in distiller's yeast, which is used in the fermentation of liquor. Its main function is to convert starch into sugar.

The function of yeast in fruit wine fermentation is to convert sugar into alcohol.

Fruit is mainly sugar and contains almost no starch.

Try adding yeast. If there is musty smell after fermentation, it is suggested to distill the wine by distillation and turn it into XO.