What solutions have you tried so far? I looked on YouTube, what they did work, my dint.
*I want to note, I don’t know-how Photoshop/designing works so good.
Is it a PNG, because it only uploads if the file is a PNG, I learned that the Hard way. I’m just saying because from your image it doesn’t seem to be a PNG, that’s all I could think it could be. Anyways, good luck with your shirt! Great design!
The correct size of the template is 585x559 while your template size is 640x611. I suggest you just resize the image to the correct size and try reuploading again.