Q: Migration assistant is telling me that it has lost connection with my Mac and to ensure they are on the same network.  They are, and an ethernet cable is plugged into them.  What do i do?

Migration Assistant has been running since yesterday evening.  My Dell is now telling me that its trying to reconnect to my Mac and to ensure they are both using the same network.  I have an Ethernet cable plugged in them and they are both on the same WiFi.  What can I do?