if the path includes any Japanese characters most extractors won't be able to extract it properly. I have used this app from your fanbox subscription and I had to open the zip in WinRAR, press Ctrl+E to set the extraction language to Japanese, then it will extract and the program will work properly
you won't notice this if you have Japanese locale set on your computer, but anyone with English will have this bug
the way you can fix this is to remove all Japanese characters from the file names, or include these instructions somewhere on the page