Yeah i have the same issue on the website it says Rename the .minecraft and astolfo folder or delete it i did both didnt work for me i also got it recently i loads up until like 70% in the Astolfo client then it just closes i even reset my pc and it didnt work after that but try to rename the folder or uninstall java with an uninstall tool https://www.java.com/en/download/uninstalltool.jsp and redownload java windows offline 64 bit maybe it will help