Okay, so I got this error and thought wow, is this really happening to me. So I sat back and thought, there has to be a reason and a solution. So, I sat back and did some thinking, I looked a few threads up about it, I flushed my dns and nothing worked. So I tried to sign in with my alternate account and it let me sign in.

So, I narrowed it down that it was my main wolftone1916 account that's having the problem. It almost immediately clicked what could be the culprit. World of Minecraft from my understanding uses our minecraft.net username and password to get the server list. Well, a ways back I had merged my said account with my Mojang account. This caused it so that I have to use my email address to sign into minecraft.net. So I went back to World of Minecraft, and used my email account and sure enough it let me sign in with no error at all...

Here's the kicker though, World of Minecraft:realms won't let you sign in with the email address as the username. So what I did to go back to World of Minecraft is go get my direct connect URL and use that to get in.

I hope this helps to anyone else who has this issue currently.