Stop Safely Now message...
I've gotten that message twice in 9000 miles. The first time, it took several attempts to reboot the car. (That's because I didn't wait long enough.) I took it to the dealer where they kept it for a week. (Worst week of my life having to go back to pumping gas.) They replaced the indoor cabin air temperature sensor. I don't think that was the cause.
The second time it happened, I was just starting out in my work parking lot.
The trick is to turn the car off and wait for the entire instrument panel to go dark. Opening the door might hasten this. After that, you should be able to start the car normally.
If this happens more than a couple of times a year, something is really broken and needs to be fixed. Otherwise, chalk it up to an occasional software glitch.
Drive a Focus Electric?
Find charging stations at www.chargepoint.com