Q: Apple Watch suddenly says charging not supported with this accessory.

Last night, every time I connected either mine or my wife's Apple Watch to either charger, both gave us an error saying "Charging is not supported with this accessory." I have never had this issue before. I purchased my watch in December and my wife's in June. I restarted both devices, cleaned the backs of both watches, cleaned the concave side of both charging cables, but the problem kept coming up. If I jiggle the cord while it is connected to the watch, they will begin to charge. Mine managed to charge all night, but my wife's didn't. Any thoughts before I make a trip to the Apple Store to get the chargers replaced?