We never heard anyone encountering this issue before, so it is most like an issue from your end. Are you using windows?
Remove the old files, redownload it again, unzip it using any extractor software like Winrar, and then double click GirlsGirlsGirls.exe
You can also join the Girls! Girls! Girls!? discord channel, and send a message to the "GGG Modmail" to open a support ticket and we can help you directly!
You can join the server here: https://discord.gg/A9QcEbPsqG