Test the Sprite in Palette Editor, click on one of the colors in the palette and it will show you if something is wrong
OR you can try testing it in a clean iso. I actually had a similar problem the other day when trying to insert a sprite, tho it wasn't the same error you are getting
OR you can try testing it in a clean iso. I actually had a similar problem the other day when trying to insert a sprite, tho it wasn't the same error you are getting