@trublion - your application.cpp needs an update:
// Get the IP address of the Spark Core and send it as an OSC Message
coreIPAddress = Network.localIP();
coreIPMessage.add(coreIPAddress[0]).add(coreIPAddress[1]).add(coreIPAddress[2]).add(coreIPAddress[3]);
Error message:
Network.localIP(); has been deprecated in favour of WiFi.localIP();
Change coreIPAddress = Network.localIP(); to coreIPAddress = WiFi.localIP();