Okay, so I am very new to Game Development and I imported a .png file(made in Paint) to the assets and that file contains just a circle and an oval, not touching and far apart from each other, both of them coloured blue. When I open the sprite editor and click on splice, then select Automatic and Delete existing options and then click slice, I do not get different sprites, one containing the circle and the other containing the oval. The image isn't sliced at all. I have also set the sprite mode to Multiple, but to no avail.
This is the image.