Remove Dark Edges From GIF

I have an animated .gif with transparent areas that’s showing distracting black spots around its edges. All I need is a cleaned-up version where those artifacts disappear and the outline feels smooth and seamless, as if the issue never existed... (Budget: $10 - $30 USD, Jobs: Adobe Photoshop, Animation, GIF Animation, Graphic Design, Illustrator, Image Processing, Photo Editing, Photoshop)