Two things:
- ndnSIM is not ns-3 (it's based on ns-3, but it's not ns-3).
- You don't even take the time to write a message, you just a header and a screenshot.
On this basis, I can safely say that you're very rude and you lack the basic netiquette.
However, it took me exactly 30 seconds to find the issue. I bet you can find it as well.
Hint: setDaemon() is not a function in ns-3, and I'm ready to bet that it's not in ndnSIM either. Plus, the last ndnSIM update was 2 years ago. Something did change in the meantime.