I am trying to upvote Beofett's answer on How should I help my 9years old son to get back on TAG program
The first time I did it, I got a red box with an error message saying 'error processing request, try again later' or something similar.
I have tried again since then (it was a few hours ago), and I have not been successful.
I am using IE 11 (latest version) Windows 8 (desktop).
I did close the tab with SE in, but I did NOT close the browser window, I just reopened a new tab and tried again
UPDATE: closing and reopening the browser did not help. I was able to upvote successfully in Chrome.