Sure, attached you can find 2 pak files, one for Editor (uncooked) and one for stand alone builds (Cooked for Windows (PC)), the contents are a bunch of textures – Flag textures to be precise –
Note: Is always better to work using the full source code of the engine, not the binary build, in that way you can see the full stack trace and figure out issues as they come in a more verbose way.
Hugo.