Have you unblocked the exe file from the miniclient? Maybe that’s why it won’t work? If not, maybe this will help you:
https://www.tenforums.com/tutorials/85418-how-disable-downloaded-files-being-blocked-windows.html
Otherwise you can try to download Maxthon Nitro browser ( FP included) and see if game will running there, you might have to unblock this file too, so then follow the link above =)