When I updated to Minecraft 1.9 so worked just fine so I went out of the server and into and now there is this Bug.

This Bug doing so I do not get to play and it happened when I updated to 1.9. It is very annoying and I tried to create a new server but then it was not. My computer is called Acer Aspire E 15 and my operating system is Windows 8. Please give me a feedback fast .