I have also been getting this message today. I noticed if my page has not fully reloaded i get this message, also if i wait a few seconds after the message upvoting works.
I have also been getting this message today. I noticed if my page has not fully reloaded i get this message, also if i wait a few seconds after the message upvoting works.
Interesting, perhaps some connection issues are to blame then
I'll try with a ''cleaner'' computer tomorrow