Error: error while updating property 'startpoint' of a view managed by bvlineargradient. Null

[iLightFPS]

I'm trying to make a linear gradient generator but keep getting this error when using the slider to change the values from 0-1

const [startX, setStartX] = useState(0);
const [startY, setStartY] = useState(0);

<LinearGradient
  start={{x: startX, y: startY}}
  end={{x: 0.5, y: 1.3}}
  locations={[0.4, 0.9]}
  colors={[colorOne, colorTwo]}
  style={{
    height: 200,
    width: '100%',
    borderRadius: 10,
}}></LinearGradient>

<Slider
  thumbTintColor="#fff"
  minimumValue={0}
  maximumValue={1}
  step={0.1}
  value={startX}
  onValueChange={val => setStartX(val)}
 />

Edit: spelling