I am trying to query a boat ramp database and none of the dropdown menus will populate with the unique values from the field. The layer is loading and the values are visible when I configure the clause in the Expression Builder.

However, when turn on live view, or open the preview and try and select from the menu, the values won't load:

This has been worked just fine until today, so I have no idea what to do. I tried deleting the widget and starting over but got same results. Also, I have two other Query widgets configured with other map layers and I don't have this issue. Also, if I add multiple expressions none of them will populate. It can't be an issue with the data, because it loads in the map:

Has anyone else had this issue or may know what is causing it?