I have several layers in my workspace, stored in postGIS. If I go to "preview layers", it will work OK, not tiled though.
I need it to be tiled for my app, so I have it activated in all my layers, and as such, every one of them is shown in "Cached layers", but if I try to preview them, it's just an empty canvas. If I do a GET petition from my app, it works but it's just empty.
I've got my suspicions but WMS service is OK as normal layers work.