Can't open any world

Duplicate of MC-249324 which was later resolved as "Invalid". Your Minecraft player/user name must meet certain requirements in order to play the game. Please see the following article for more information: https://help.minecraft.net/hc/en-us/articles/4408950195341-Minecraft-Java-Edition-Username-VS-Gamertag-FAQ

Thank you for your report!
We're tracking this issue in MC-249324, so this ticket is being resolved and linked as a duplicate.

That ticket has already been resolved as invalid. Please take a look at the parent ticket (MC-249324) and see if an explanation is provided there in the description of the ticket or in the comments for why this issue is invalid.

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I changed my name to English.Fixed.