This has happened to me numerous times over the last couple years and it is so frustrating I decided to open a thread about it. Basically, when I go to vote sometimes the GTOP page will load with a different UI (Like this - https://prnt.sc/l370i3) and when it does, if I go to hit the vote button after fulfilling the captcha, nothing happens! I try it again and the same result! This is with chrome and the newest updates. I've tried firefox, I get the same error. I've tried IE and get a different error. Basically, with IE it loads with the normal UI but the button still doesn't do anything when I confirm. I've also tried incognito mode and it gives me the same results as with IE. Please help because this is very frustrating and it means I can't get any NX until GTOP decides to magically work again one day. Please do not suggest I use a mobile phone, that is not a solution to my problem and I don't have that as an option.
Disable your AdBlock. Also if you're using NoScript then make sure everything is allowed, at least temporarily.