Problem with first login

So, I have used FreePBX before, and never had this problem. After I install the OS to my server (physical or virtual), I go to the web console, enter my desired username, password, and email address. After I do this, I click submit (or whatever the button is labeled) and it brings me to a white screen. Nothing happens. When I go back to the page, it just shows the first login screen. Should I try to restart the webserver? If so, what commands will restart the webserver? And what webserver is embedded with FreePBX?