What exactly do you mean by 'not working'? I'm not sure so I'll just take some random stabs. Either, your account was banned temporarily or permanently, the server is offline and being updated or it just randomly disconnected. Please further describe your question so I can give a proper answer.
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You wait for it until it starts again. It may take 1 to 30 minutes.
-Debug im not sure if it is still working if it isnt change your warcraft III version to the old ones and play 6.45 ai and enter -debug 100% it works
he isnt
if your on ss/ gg there isnt
It isnt a seed, you have to download it.