so i want to start playing 6.1 one but when i click play so the launcher updates it crashes

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What I expected to happen was...:
Describe what you thought should happen here
i thought i was going to start playing...
What actually happened was...:
Describe what happened here
it crashed when uppdating the minecraft launch to 6.1
Steps to Reproduce:
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1. first i click play
2. then it loads
3. then it crashes
p.s the launcher crashes when updating is what im trying to say