Left menu error

Hi ufrrj99. That appears to be an issue with the way the plugin displays the submenus. You might check on the plugin support forum to see if someone there has any suggestions.

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 …..

The plugin creating your menu is the JQuery Vertical Mega Menu Widget. It’s already installed and activated.

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 don’t know if it works on other WordPress installations. You could check the plugin reviews to see what other users say. My suggestion would be to post your question on the plugin support forum and see if anyone there has an answer.