Crashing trying to join lan world/create new world

[YardPlaysMC]

listen, I have posted this before, and got a warning, I can't post on the tracker though, because everytime i try, it says: Error: required field remained empty or some other thing like that, and I have tried again, looking carefully, but nothing is missing, that's why it was posted here, someone help me with it plz?

 

[Munaus]

you left a field unwritten, either you didn't type what java you had or the Operating system. It gives you the error if you neglect either or both of these