Can’t click on links or insert text in plugin admin screens in WP

Hello all,

I am having a strange problem in my WP admin screens. Whenever I navigate to any installed plugin, I would not be able to click on any link/button or insert into any textbox of that plugin’s admin screen in WP. I am not sure what caused this problem. I already cleared cache, deleted history, deactivated the plugins then re-activated them, tried different browsers etc., but the problem still remains. Please help.