When you start the official Minecraft launcher there is not a joyful picture: the usual, meager gray screen.
Earlier, in the old version of the launcher, I had a similar error, I do not know how to fix it, I have to use analogues.
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Please attach the full launcher log found in
[minecraft/launcher_log.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder/]
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