We've identified an issue in the current Minecraft Beta and Preview version that causes chunks to become corrupted below Y=0. To avoid corrupted chunks, please refrain from opening your worlds until an update has been released. - jhp
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The migration is having issues, would be nice to have a customer support to contact about it.
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Can you send us a screenshot of the error you're seeing? Be sure to remove any personal info such as your email address. ^NS
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there is the one before i click install
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and here is after, the button greys out and says play and nothing else
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Replying to @IamDovikin
Thanks for sending over those screenshots! That's definitely odd. Go ahead and create a ticket at msft.it/6017wFGnz and include those screenshots. Our Tech team can help out further from there! ^NS

Apr 14, 2022 · 4:28 PM UTC

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Replying to @MojangSupport
i have done that twice so far with no success, will try again with the images for hopefully better results