Can not upscale and download "2x" image

[arlins]

Hello, thanks for providing such a great tool.

I have successfully installed StableStudio on the Mac according to the installation prompts, I opened "http://localhost:3000" and configured the API Key, and entered the prompts, StableStudio successfully generated the pictures I wanted, but I couldn't download 2x pictures , 1x images can be downloaded successfully. Select "2x" and click the "Upscale and download" button, StableStudio can't save the 2x image for me, what should I do?