I was working on some project and I noticed when I wanted to build it, it happened this:

so don't really know what's going on in here, apparently is an error from the Engine itself, correct me if I'm wrong...
Version: Godot 2.1.3-latest-stable
Additional Note: this is happening on all projects I compile. Should I re-download Godot and check if the problem continues? I haven't tried that just yet.