Jun Seo Park

The problem is not the way the addons are created, meaning it's not a specific one, since the issue happens with any addon, including marketplace addons.

But as I mentioned, if there are any packs inside development_behavior_packs or development_resource_packs, that's when it crashes upon importing a .mcaddon.

Antivirus: I don't use one, I've never used one, and everything was working fine until version 1.21.90 was released — that's when the issue started, and it continues in 1.21.92.

This happens with all .mcaddon files, whether I download an addon from MCPEDL, CurseForge, or even from the Marketplace — the game crashes as soon as the file is imported.

I did some testing to figure out the cause, and I found it: if there is any content inside development_behavior_packs and development_resource_packs, the game crashes when I try to import a .mcaddon.

And no, there are no duplicate addons, textures, or UUIDs inside development_behavior_packs or development_resource_packs. The crash occurs as soon as I try to import any .mcaddon file.