Before Continuing:

• Check you are using the latest version of the mods and its dependencies
• Always include a latest.log if you are crashing
• Remove known hacky mods such as: Optifine, Fabric API/Connector on forge, and every kind of hybrid server like Mohist and Velocity. None of these are supported. Also try without other lesser usual suspects like Sodium and Lithium.
• If you are unsure which mod is the culprit.
  Disable all of your mods and enable them 1-2 mods each time to isolate the culprit
• Confirm that there is no existing issue with a similar description submitted in the list of issues.

Version

1.20.1-FORGE

Supplementaries Version

any

Moonlight Lib Version

any

Describe Issue

crash-2025-10-02_10.17.54-client.txt

No matter what version of the 3 mods are used, it all results in the same crash. When those 3 are removed the pack launches with no issues.

You have a mod that's fucking up the block to item map. Normally that just leaves random hard to find bugs. When I detect that I hardcrash the game immediately to prevent any harm. This was reported before. It was create addon

Looks like it is the newest version of Design and Decor and this just popped up as of 2 weeks ago when that version was released. Thanks.

might want to report there