ok so I am trying to login into a server and whenever I join it says [proxy] connection lost and sometimes it says Javaio the host has stopped I have dissconected my router and relogged in minecraft
That's weird. Try closing and restarting your minecraft client. What version of Minecraft client are you using? Make sure you are using 1.8.9.
Oh, I was talking about connecting to the Sandlot. I'm not sure what to tell you about connecting to a different server. Sorry.