Thank you ! I cleared the cache and now have my Discourse installation success page.
The point is that registration issues on this page (right after entering username and password) http://discourse.apertureproject.me/finish-installation/confirm-email
Edit because I cannot send messages here more right now : Retried and it still doesn’t work unfortunately. So frustrating
Second edit : it wont let me send more messages. I’d appreciate that you try anyways, that’s nice of you ! You can add me on Discord, maybe will it be easier to chat. nekodroid#0001
x’(