Letter "i" in a Yellow square box ?

[Lez60]

Just had the latest Software Update and Granny Cable fix. All good, evertrhing working OK...but now, after about three miles driving, a yellow letter " i " in a square box lights in the drivers dispaly, to the keft of Driving Mode. Any clues folks ? see pic.

 

[Carousel]

Nextbase GW422, hardwired professionally by an Installer. It was connected into the fuse box under the steering wheel area.

Ditto apart from GW522