For anyone facing this problem, the fix will be to vote using another browser other than chrome. Note: Currently there is a fix which is to vote on another browser other than chrome, if you have any other alternative method to fix this do post a comment below Doing the following may not solve the error: Restarting the wifi Switching over to mobile data Clearing the browser cache
You can refer to this thread https://royals.ms/forum/threads/troubleshooting-voting-issues.140129/#Voted
I've found using Google Chrome's incognito mode will allow me to vote when I run into this issue without having to restart wifi or clear browsers, might be useful if it works for others.