Well, it speaks of "request", which suggests that something tries to talk to some server process or tries to do some networking. On Windows, I would have said "might be the DDE server", but there is no such thing here
So what else could it be... Code::Blocks could fail trying to open a network socket (it does not
) or it could access something else that uses network, clearly printing comes to your mind at this point.
To verify this hypothesis, I spent half an hour on the web looking for this error message. And indeed:
Everything which relates to this message or a remotely similar message has to do with cups or gnome-cups, either in combination with ipp or smb.
So the assumption that it has to do with printing (and cups in particular) seems likely.
Now the question is what to do... maybe you should try to actually print something, if it is really related to printing, then you should immediately get an identical error. That does not solve the problem, but it confirms the origin.
Or look what happens if you actually run the cups demon (properly configured). If the problem is just that C::B can't connect to it, then that solves the problem.