How do I avoid the "pin board has not yet been used" error

I just installed antiX Linux 19.3. When I (auto-)login and IceWM comes up, I get an error dialog saying: > The pin board has not yet been used ... set the default background. Start ROX-Filer with 'rox -p = Default' to activate the pin board. 1. WTF? I haven't done anything. Haven't even touched any configuration settings, and already an error? 2. Who starts rox? i.e. where should I start it differently? 3. What is the pin board, and should it be "activated" at all? Note: I've seen some forum threads suggesting an increase to some startup delay; and people reporting mixed results with that. I'd like a proper solution please.