MIke-01 is a connection issue. Check your firewall and read this:
https://support.ubi.com/faqs/38816
Delta-03 after a couple of minutes could be a Network card power issue or wifi problem. Make sure PC is running on High performance profile and then go to device manager and find your network card. Make sure the box that says turn off this device to save power is unticked.
Also, in your power management profile make sure your wifi adapter settings is set to maximum performance in advanced setting of the power management profile if you are using wifi.
I don't recommend wifi for gaming because it can sometimes be unreliable...