我刚才意识到我的图像实际上是Adobe Illustrator图像。我所要做的就是将图像从.png重命名为.ai并且它有效！

I just realized that the image I had was actually an Adobe Illustrator image. All I had to do was rename the image from .png to .ai and it worked!

对于那些想知道的人，可以快速解释两者之间的区别：

For those wondering here is a quick explanation on the difference between the two:

.ai - Adob​​e Illustrator矢量文件可以向下和向上扩展。

.ai - Adobe Illustrator vector files are scalable both down and up.

.png - 像素文件可以按比例缩小，而不是向上。

.png - pixel files can be scaled down, not up.