The scissors icon means that you have text that is beyond the printing area. Please resize your text box to fit within the printable area. Once you make this adjustment, the scissors icon will go away.
If you see the scissor icon but your text is completely visible on your product, resize the text box to better fit the text and the warning should go away once the text box is completely on the product and no longer off the edge of the product.
To see a demonstration of how to transform your text, watch the video below.