I already created a subdomain and it is called forum when I tried to install in it, it gives me an error because it is not empty. Then I created a folder inside that directiory which is called flarum then I installed the Flarum and all extensions which I need. After all when I typed in my subdomain I cannot see anythink to installation wizard so I am not sure what I am doing wrong.
I am using siteground and I install the flarum with SSH via Putty
Thank you for helping