Minecraft 1.21
Fabric 0.16.5
jei-1.21.1-fabric-19.17.0.193

Steps to Reproduce the Bug

Add items to blacklist.cfg or blacklist.json, open JEI, they're still there

Expected Behavior

Items not visible after blacklisting

Actual Behavior

Items are visible after blacklisting.

Mod Pack URL (Optional)

Curseforge pack import - link is not an instant download

Mod Pack Version (Optional)

Not applicable, custom in-dev modpack for friends

Extra Notes (Optional)

Maybe I'm not formatting the .json file correctly? I don't see instructions for that, I just copied over the .cfg list inside the brackets.

Perhaps this is a dupe of #3714 but it's still happening for me on the latest JEI, jei-1.21.1-fabric-19.17.0.193.jar
Can not check prior versions as this is the only version compatible with Fabric 0.16.5.
I know this only happened in the past few days since I've updated to latest Fabric/updated all my mods but I know that's not very specific

latest.log

latest.log

Downgrading to 19.8.2.99 fixes this.

The latest version for 1.21.1, 19.17.0.193, is compatible with 1.21 in that it launches and mostly works, but the blacklist specifically does not

Hello,
The blacklist json file is not meant to be edited directly, it is a new format.
Please use the in-game "edit mode", which can be enabled by setting a key binding for it in the controls settings.
I have just implemented key bindings on fabric, so make sure to get the latest version of JEI in order to try it out (19.17.0.196+).

The edit mode will let you hide items easily by ctrl-clicking them, and it will write the items to the blacklist file for you.

Thank you fixed