Can't play Minecraft 1.13!

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First off you don't need to download LWJGL 3 as its already packaged with Minecraft. Second this isn't a bug and this is a bug tracker not a support forum. It is recommended if you are not experienced in reading error logs, console logs, crash reports or the like to stay away from in development snapshot versions of the game.

This is NOT the place to go to ask for help and you will most likely not get anyone to help you here unless you post an actually bug with proper crash logs attached.

OK, I'll say the real bug.
When I press the PLAY button, button changes to PREPARING, and, after minute, it changes to PLAY. When I press the button second time, nothing happens.

I also downloaded the version, bug is there.

You need to go here: http://hopper.minecraft.net/help/technical-support-resources/ and have them try to diagnose your problem.

Bug is fixed when i buy minecraft from minecraft.net. I give Mojang real info - I was using Titan launher. I now using the official launcher. Sorry for that! 🙂