I recently had an issue with the host and after it got resolved, a slightly transparent overlay covers my homepage when you click anywhere.
The x button also doesn't work, and the overlay only leaves when you hit escape on the keyboard.
It also doesn't leave when I let it idle.
I can however access other pages if I right-click and open anything in a new tab.
https://regentcollegeabuja.com/
How the homepage reacts to clicks
I've inspected your code, and you have a jquery error. This is coming from swipebox plugin. You can try to fix the issues by following the steps.
1) Update your WordPress core, themes, all plugins after updating test your site from the guest window. Sometimes resolve the issue by this way.
2) Deactivate the plugin and activated it again.
3) Inspect your code, understand the problem and update the JS file.