Actually, I think there is a simple explanation.
Your connection to the WL server is poor. Try this: when you see a black dot, wait several seconds till you give up. If the connection is there but not that bad, it should turn e.g. yellow in a few seconds. Then you can proceed.
Otherwise, it does happen that the WL server is "down" to you and you can only try again at a later time.
I have experienced what you did several times and it is nothing to do with clients or their versions.
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i tried ur suggestion.(FEODRE). i waited 10 mins XD still not working:( ^T TT
i guese i just have to go sleep waaaaa1!!!! poor me