Sorry for making a separate post on this, I didn't see this one. I've deleted the duplicate. For anyone else having this issue, you can resolve it by opening src/sdk/infowindow.cpp and making the following change to the InfoWindow::Display function:
// static
void InfoWindow::Display(const wxString& title, const wxString& message, unsigned int delay, unsigned int hysteresis)
{
return; // NO
problem solved!