My Game is Crashing

[MinecraftBuilder]

I entered a world in the user contributed worlds, and it was all laggy. After flying for around twenty seconds, the game crashed, and said I was disconnected. Is there something wrong with the learntomod start server page? Thanks for helping if you do.

[Scastle]

Which world did you download? We recommend downloading only the curated worlds as those have been tried and tested to work.

Try downloading a curated world if your game is still crashing.