the launcher doesn't start the game

Are you using Discord? If so, does closing it fix your issue?

no it doesn't

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.

We do not have enough information to find the cause of this issue.
Please attach the launcher log (.minecraft/launcher_log.txt) here.

Once attached, the report will be reopened automatically.

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See MCL-6550.