I tend to get this every few years or so, then it magically turns itself off after the next ignition power cycle on my 2016
cupra. Having looked into it, it seems to be if the car believes there's an issue with the abs sensors so it disables your cruise control as a safety measure.
No idea why, it always tends to happen in the way to Norfolk. Maybe it's offended that I'm too cheap to pull into center parcs Thetford