thats not a duplicated cause i'm at my microsoft account after i already migrated and it's at demo makes 4 days
u need to update java
you tried to switch browser?
and why u need to access minecraft.net?
check the: https://bugs.mojang.com/browse/WEB-2571
maybe help
Well, maybe you could try open at another device or google it?
well i don't have any "special" abilities to discover if the exit code of the game crashed
but you can always google it(i solved my probles with mods and stuff with the own google)
what account, minecraft.net, mojang one, microsoft maybe, or this one?
but both ways would result at: Click ur Profile pic> Settings> Delete Account
at minecraft.net is just log in ur account and hit the edit/delete account
and that's invalid cause that is only for bug reports
so, what is your device, what browser, check your internet connection(sometimes i can't connect to mojang when my internet is low), try to open the minecraft.net page by searching for the link at an google tab < '-'>
and that's for bugs reports from what i know
i literally used the same exact email for mojang and microsoft and is at demo but i still can play but i can't play at servers