When I try to install MyBB I get to the installation welcome screen, but when I click next I get a 503 Sevice Unavailable message. I tried a again and in a few hours and get the same message, so any help is appreciate.
When installing via Softaculous, it gives you an option to install it into a subdirectory unless you tell it not to, by default it installs into a subdirectory called mybb. The most straightforward way to address this is to uninstall it and reinstall it but back out the folder option in the installation settings.