Good to now see the relevant screen shots. Sorry, network stuff above my pay-grade.
I did a search via Google for “asyncsocketerrordomain 2” and found:
and
which my hunch is the direction towards solution. There are other “hits” on same keywords involving other products, but all point to network settings on the devices.
In addition to doing a ‘reboot’ try shutting down completely both devices, leave quiet for a a few minutes (for it to forget everything), then restart. Sadly, works sometimes.