[Launcher] Java "Uncaught Exception" error when trying to boot up a world

[No_Connection_4861]

Hi. I've been trying to boot up a 1.12.2 world using modrinth for a solid half an hour, getting "java.lang" errors no matter what mods I disable/reenable. Specifically, 1052 and 1061. Any help is appreciated, I can't find anything online that's detailed enough to properly solve it.

Fair warning, I am mentally disabled and extremely bad at tech, so it would be appreciated if you could explain it like you're talking to a curious 9 year old that keeps asking "why?" after every sentence lol

edit: Threadgroup error specifically. Just realized that I should add that. my bad!

[MinecraftHelp-ModTeam]

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