I traded my FFE in 3 1/2 years ago when I bought a Tesla Model 3. However, I never uninstalled the Ford Mobile App from my phone, and this morning, I got the same message. I found it interesting that Ford referred to this capability as a "complimentary trial" that was included with the car at time of purchase. They also said that owners could purchase a 4G modem upgrade kit and download a different app to keep the service running.
GONE - 2015 FFE, Magnetic with leather interior, debadged & tinted
38,500 miles (since May 2015), average 246 Wh/mile
REPLACED WITH - 2018 Tesla Model3, LR RWD, Obsidian Black
20,000 miles (since Nov 2018), average 235 Wh/mile