Got into the same problem. And I figured out that restart Aseprite will fix it
skief7
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A member registered Sep 11, 2021
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InvokeAI - The Stable Diffusion Toolkit comments · Replied to roxannar in InvokeAI - The Stable Diffusion Toolkit comments
This can be (random) cause when you set image size out of range. Try setting the image size between these number (512, 768, 1024). When image size out of these number sometime it work, sometime it won't. Make the prompt longer also fix this problem. And finally if it doesn't fix, your VRAM might already full.