First try clicking the little greenish square next to the layer's label in the timeline that is showing in your screenshot. That is the outline control for the layer. If that doesn't change it, then click it again because it was probably okay and you will possibly have set it to show just the outline... it should appear filled.
If that didn't resolve it, then in the menu bar select View -> Preview Mode -> and select something other than Outlines.
Select the object - Ctrl+Alt+Shift+A