The Mod Kit is large, and a lack of space can cause installation stalls.
The Mod Kit is much more demanding than the actual game. If your system doesn't meet the requirements, the editor may never finish loading. [Solved] Unreal Editor loading stuck at 45% - C++
Because the Hello Neighbor Mod Kit includes a vast amount of high-quality textures, 3D models, and audio files from the base game, the initial optimization process takes an immense amount of processing power. It looks frozen because Windows often stops updating the progress bar UI while the processor is maxed out in the background. Step-by-Step Solutions to Fix the Freeze 1. The "Wait It Out" Method (Most Common Fix)
: If you are familiar with config files, some users find that disabling the XGE shader compilation in the engine's configuration can resolve persistent 45% hangs. Unreal Engine How long has the loading bar been sitting at 45% for you? Updated Modkit freezes at 45% loading (SOLVED) hello neighbor mod kit stuck at 45
: Ironically, running as an Administrator can sometimes prevent the "ShaderCompiler" from launching correctly because only the main engine has elevated rights. Try launching the .exe normally. Solution 4: Hardware and Driver Checks
Close the Epic Games Launcher and the Mod Kit via Task Manager. Press Windows Key + R to open the Run dialog. Type %localappdata% and hit Enter. Navigate to the UnrealEngine folder.
: Your CPU usage may spike to 100% while this happens as "Shader Compile Workers" run in the background. Recommended Fixes & Solutions The Mod Kit is large, and a lack
: The Mod Kit requires a significant amount of processing power and disk space. Users with slower CPUs or less than 300–500 GB of free space may experience significantly longer load times. If you lack a dedicated GPU, the editor may never successfully launch.
This is often considered the most reliable method to fix the 45% issue. A clean reinstall ensures no old, conflicting files remain.
Leave the computer alone. Depending entirely on your CPU's core and thread count, this waiting game can take anywhere from 15 minutes to over an hour on mid-range hardware. Breaking the process early by force-closing the window resets your progress, forcing your CPU to restart the compilation loop from zero the next time you try to launch it. [Solved] Unreal Editor loading stuck at 45% - C++ [Solved] Unreal Editor loading stuck at 45% -
The most authoritative solution from the community is a full reinstall of both the Mod Kit and the Unreal Engine component that supports it.
: Some users report that the first-time launch can be exceptionally slow due to shader compilation, taking up to an hour on older hardware. Before trying anything else, it's worth leaving the kit to run for a while. However, if it's been several hours, you’ll need to take action.