I added the subfolder base but still nothing. I’ve been reading about it might be an mb_string and checking if that’s enabled or disabled. I’ve read through a bunch of other forum posts but am still equally confused about where I’m supposed to go to enable it or check it .
What happens if you delete everything from the server, including .htaccess and upload the 2.5.12 starter kit? Ive run this version myself on plenty of subdomains and root sites without issue. Are you sure the file transfer happened without issue? Personally I use rSync rather then SFTP. (Don’t use FTP, its a great way to get hacked.)