If it’s any consolation a LOT of diesels that have the DPFs fitted have been affected since the lock downs began.
My wife’s Evoque recently had the same issues popping on the dash. We took it for a long drive, cleared the filter. A week later that went into limp mode and had to call Range Rover assist to collect the vehicle.
The guy who brought the transporter said he’d been inundated with collecting diesels (all marques) suffering from same thing. They need a lot of use to keep the filters clear.
Not good and perhaps a reason to buy the petrol if you’re not doing the miles.