You could be lobby banned depending on the message (unless MV finally changed how their banned screen message looks like now) but I don't know your username to check the archives and it's possible a mod logged it themselves anyway if you are banned.
Well a simple google search of the following message will tell you that it's your internet so restarting your router could fix the issue.
Oh, that happens to me. I just delete MV from my server list and try again and it works. If not refresh the server list a couple times and if needed even change the IP address and then change it back.
It's not resolved. Op and Kit went down several times yesterday and is still continuing to. Might want to look into it further. It's getting to the point where players are even dying when they log back in and some are still logged on whereas some have been kicked due to a ''null error''