Design tool not working properly?

[MaggieA]

I transferred a design to a pillow just now but something is off with the design tool today. I have background color and an image in the design tool area, yet the preview show a blank product. I click done, in case it is just the "small preview" that is broken, but nothing seems to have stuck on the product either. When I click the "sell it-button" it takes me to a page saying "Request Error".

Link to product: https://www.zazzle.com/pd/spp/pt-mojo_throwpillow?fabric=poly&style=16x16&td=%7B%22dz%22%3A%2217c8cb...

Edited to add: I did a new pillow with the motif from start and that did work as usual.