What does the ABS warning light on my 2018 Hyundai i30 mean?

The ABS warning is for a problem with the anti-lock braking system (that's what it stands for) and the image of a serving car is to warn you that there’s also potentially a problem with the car’s stability control. So, no, it’s not the transmission at fault here.

Both the ABS and stability control are crucial safety systems and the car really shouldn’t be driven until these problems have been checked out and rectified. The first thing to do is take the car to a workshop and have it electronically scanned. The onboard computer will have logged the faults as they were detected and will be able to identify the problem areas to give the mechanic a head-start on working out what’s wrong.