Nissan LEAF 2023 Owners Manual
6.5.3.13. 21. Steering assist currently unavailable warning
This warning appears if the camera view cannot be secured due to rain, snow, fog or freezing or dirt on the windscreen at the front of camera, the strong light from the front or wiper is operated at high speed. If these conditions are cleared, ProPILOT Assist can be used. If the warning continues to be displayed, stop the vehicle in a safe location, turn off the power switch and remove the dirt, etc. on the windscreen at the front of the camera.
Owners Manual