probable because maximum servers have plugins which have not been as a lot as date to the newest server revision for the newest launch of Minecraft. Minecraft is often evolving and updating so servers frequently practice their new server setups at the same time as the old version servers are nevertheless up. I propose always backing up your .minecraft folder in '%appdata%' each and each and every time a sparkling replace is released. supply the servers some time to replace to the generation that got here out very last week.
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The log in screen is case sensitive. Try pressing the shift key from time to time.
probable because maximum servers have plugins which have not been as a lot as date to the newest server revision for the newest launch of Minecraft. Minecraft is often evolving and updating so servers frequently practice their new server setups at the same time as the old version servers are nevertheless up. I propose always backing up your .minecraft folder in '%appdata%' each and each and every time a sparkling replace is released. supply the servers some time to replace to the generation that got here out very last week.
along with what he said, you could disconnect from the internet if you just cant log in in general.