Cannot Edit Related Table on Arc GIS Online

[EvanSanchez]

Hi, 

For some reason unknown to me, when I try and configure the popup in arc gis online It will not allow me to select the edit buttons on my related table. They are greyed out. It will let me edit the feature class but not any of the related tables. The layer is being hosted as a feature service. Also when I exported the layer fro pro I selected the "add,update,create,delete" checkbox.  Any help would be appreciated.