i got this on 2018-05-03 and i ever once been able to get it to work. i own my own cpanel server and can confirm that i have all the req php and services. cant even get it to work in local lab.
once i get to the database install change screen just goes blank. when i got o retry the system doesnt let me and i must reupload all the files.
Can you provide your cPanel Login credentials so that I can check this for you?