Module not showing up

Hi there, I just took over a website that uses Divi (so not familiar), but I installed the flip box plugin and it doesn’t show up at all after refreshing, etc. Are there any secrets to making this work/show up?

It looks like this site also uses the main Divi theme and not the child theme which could be the problem? I’m happy to create a login if you need to look at things, thank you!