MyBB Community Forums

I'm trying to use this Steam Login Integration:
https://github.com/noxwyll/Steam-Login-MyBB-1.8

So far, I've installed the plugin correctly and installed the required Nick's Display names. But on the actual plugin page, it says that I need to install "x CURL PHP Extension". I've looked around and couldn't work out how to install it. Can anyone help me out?

This is an PHP extension, you need contact your hoster to activate this for you.
If you are on a freehoster ask them too, but most of them activate them only with a request limit per hour and day.