[1.21.1 Fabric] Compatibility Crash: Embedded Dependency 'Veil' Conflicts with 'Modern UI' (Dear ImGui Assertion Failed)

[bcggxx]

Hello,

I encountered a compatibility crash when using the Effective mod alongside another UI mod, Modern UI. The game crashes shortly after starting, during the rendering initialization phase.

The crash log indicates the failure occurs within your mod's embedded dependency, Veil.

1. Problem Description

When both Effective and Modern UI are installed, the game crashes immediately after loading. The log shows the Veil dependency is triggering a Dear ImGui Assertion Failed error.

2. Mod Versions

Minecraft Version: 1.21.1

Mod Loader: Fabric Loader 0.17.3

Effective Version: 2.4.8-1.21.1

Modern UI Version: 3.12.0.2

Conflicting Dependency (from log): Veil 1.0.0.85

3. Steps to Reproduce

Install only the listed mods on a clean 1.21.1 Fabric 0.17.3 instance.

Launch the game.

Result: The game crashes during the rendering setup.

4. Crash Log Snippet

The stack trace clearly points to the Veil dependency:

latest.log

Thank you for your time and assistance in resolving this compatibility issue!