Information

Minecraft version: 1.21.3
Modloader: NeoForge
NeoForge version: 21.3.2-beta
Environment: Singleplayer

Mod name: Double Doors
Mod version: 5.9

Description

Mod does not allow simultaneous opening of two adjacent doors.

Crash report

No crash.

Unfortunately version 6.0 of DD did not fix it. Now it crashes:

https://paste.ee/p/ceVqM

Make sure to update Collective as well, I see you're running an old version. Does that fix it?

Works now! Thanks again!
The version of Collective had the same version number (7.89) so I didn't notice it still said 1.21.2 in the file name. Blame MultiMC for just showing the version number.