Windows .exe Can't Connect to server: Unseen error. Please help!

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Roboguy99

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Jul 29, 2019
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In all my time playing minecraft, I've never seen this error. I've just made a server through Hamachi for Feed The Beast and the server runs fine. When you go to connect it even says it's online. When you connect you get this error:

Code: 
Connection Lost
Failed to login: java.ioException: Server returned HTTP response code: 503 for URL:
http://session.minecraft.net/game/joinserver..jsp?user=Roboguy99&sessionId=-
 
8138309796002956869&serverId=h98bcd3278512be30be9a87cf3074dd31a07324

I have tried it on 2 computers, both with the same error. Can anyone please help?!
 
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