GIF upscaling is not working

[leeshey]

After input the GIF file and pressed 'Reupscaling GIF' button, the program shows 'Upscaling is now complete' message.
But I can't find any upscailed image frames in '_temp-project\image-frames' or '_temp-project\image-frames2x'.
I think that means program does not worked.
Anyway, when pressed 'Merge with FFmpeg' button, terminal shows error
Could find no file with path 'C:\Users\<username>\Documents\waifu2x ncnn Vulkan - GUI Edition Reloaded (waifu2x-nVGE)\_temp-project\image-frames2x\image-%09d.png' and index in the range 0-4 C:\Users\<username>\Documents\waifu2x ncnn Vulkan - GUI Edition Reloaded (waifu2x-nVGE)\_temp-project\image-frames2x\image-%09d.png: No such file or directory
Is there any way to fix this problem?