1.20.1

https://forums.minecraftforge.net/topic/125109-1201-game-crash-error-1-log-provided/

https://bytebin.lucko.me/gQDZlOHLv1

https://crashy.net/0f5a45c8-9d0d-4359-aa6a-abf3dc98d9b3

As far as I know, the grass and flowers aren't placed on slabs. However when attempting to destroy a flower or grass that was made with bonemeal, the game crashes. My save is completely broken! According to the second link, the only mod mentioned is this mod.

Frustratingly I can't remove the mod from my load order just yet, because I spent an ENTIRE DAY building my home that uses slabs.

Okay! I will look into this crash when I wake up. Currently just after midnight where I am.

Hopefully will be easy to fix.

Thank you so much! I sincerely appreciate the quick reply!! I will patiently wait for a fix. <3

I believe this bug has been fixed in the latest version of Extended Slabs +.

https://legacy.curseforge.com/minecraft/mc-mods/extended-slabs-plus/files/4656056
If the link does not work at the moment then the file is still being approved by CurseForge

You're a lifesaver, thank you so much!!!