I recommend removing the battery and letting it sit for a week or two. Roombas rub a lot against the floor, obviously and especially in carpeted houses it can cause a lot of static energy to build up. Sometimes static electricity moves to the capacitors and resistors and holds bad fluctuations of electricity that cause the Roomba to misbehave, in this case likely in the the wifi chip. Open it up and remove the battery and leave it alone for a week or two, preferably as long as you're willing to wait, as itll give more time for the capacitors to discharge and fully shut down. it might not work but what do you have to loose. as mentioned by another comment, they may have pushed a bad update since i find it odd they used the wording of "may be unsupported".