I am trying to use the Filter option. The problem is that there are no Layers shown in the Drop-Down menu. How can I fix the problem? How can I select a layer?
What type of service (i.e Feature, Map) do you have added to your web map?
I got same issue with CSV import file (the demo one).
I have to echo Jake question. Do you have any operational layers in your web map or is it just a basemap?