I created a Flutter native splash screen with a PNG image, but it unintentionally displays a splash screen with a green border like the second image below. How can I remove this border?

See the original PNG splash here:
Click here to see image

See the issue here:
Click here to see image

Here is the code in pubspec.yaml

flutter_native_splash:
  color: "#FFFFFF"
  image: assets/splash_screen/splash.png
  android: true
  ios: true

Thank you very much!

I tried to remove splash and add new again, but the border is still there.