ufrrj99

This Mega Menu appears as Demo on their website .
He is working normally on other sites wordpress ?
I’m trying to fix the defect of it but I can not , he is appearing beneath the main text.
Do you have any idea what could it be?
Thank U.
https://institutos.ufrrj.br/ichs/

I found the menu plugin below:

https://www.ads-software.com/plugins/responsive-menu/installation/

Is saying to activate the plugin in wordpress but where there is this option ?

My wordpress nothing appears on plugins …..

Thank you all for the help.
I left the last posts as homepage to facilitate all .
3 posts created as an example but they are not automatically running the slide.
I was in ” post highlights ” and put the time in 1500 but the posts are still standing .
What can be the problem?

Could you explain to me calmly as I install this plugin?
Never installed a plugin so I’m lost.
Thank you all.