TinyBuild has acknowledged the 45% bug in patch notes for v1.3.2 (2023) and v1.4.0 (2024), but some users still report it. The devs recommend cache clearing as the primary fix. A permanent patch is not yet confirmed.
Do not try these out of order. Start with Step 1, and stop when the problem is solved.
If these steps don't resolve your issue, it might be a more specific problem related to your system configuration or a bug within the Mod Kit itself. In that case, reaching out to the mod creators or the community for more targeted advice is your best bet.
If your Hello Neighbor Mod Kit is stuck at 45%, the primary fix is simply to wait. This is a common behavior of the Unreal Engine 4 editor when it is compiling shaders for the first time. ⚙️ Why it stops at 45%
Shader Compilation: This is the stage where the engine processes all the lighting and textures.
Initial Launch: The first time you open the kit, it must compile thousands of shaders. Subsequent launches will be much faster.
CPU Intensity: This process uses a large amount of your computer's processing power. You can verify this by checking your Task Manager for "Shader Compile Worker" processes. 🛠️ Troubleshooting Steps
If the kit has been stuck for several hours without progress, try these steps: 1. Just Wait (The "Patience" Fix)
Depending on your computer's speed, this can take anywhere from 10 minutes to over an hour.
Do not close the program unless it is marked as "Not Responding" for a very long period. hello neighbor mod kit stuck at 45
Avoid running other heavy programs in the background to speed up the process. 2. Check Hardware Requirements
If you have waited for 3+ hours and nothing has happened, your hardware might be the issue.
Dedicated GPU: Ensure you are not running on integrated graphics.
Storage: Move the mod kit to an SSD if possible; it significantly improves loading times. 3. Update Graphics Drivers
Outdated drivers can cause shader compilation to fail or hang. Check your GPU manufacturer's site for the latest version: NVIDIA Drivers AMD Drivers 4. Firewall & Internet Issues
Sometimes the engine hangs while trying to verify files online. Try disconnecting from the internet and launching the kit.
Ensure the Epic Games Launcher and the Mod Kit have permissions through your Windows Firewall. 📂 Advanced Fix: Clearing Cache
If the loading is truly broken, you can try clearing the local save data:
Navigate to your mod kit folder (usually in Epic Games\HelloNeighborModKit). Go to HelloNeighbor > Saved. TinyBuild has acknowledged the 45% bug in patch notes for v1
Delete the DerivedDataCache folder. This forces the engine to restart the compilation process cleanly. If you'd like to proceed, let me know: What are your PC specs (specifically your CPU and GPU)? How long has it been stuck at 45%? Is this your first time opening the Mod Kit? [PC] The game crashes at start – Hello Neighbor Support
The Hello Neighbor Mod Kit appearing "stuck" at 45% during the loading screen is a common occurrence caused by the Unreal Engine 4 backend compiling shaders for the first time
. While it looks frozen, the engine is actually processing a massive amount of visual data in the background. Unreal Engine Why it Stops at 45% In many Unreal Engine projects, including this mod kit,
is the specific threshold where the editor initiates shader compilation. Shader Compilation
: The software is translating graphics code into a format your specific video card can understand.
: This process is highly demanding on your processor. You can verify it is still working by opening Task Manager
(Ctrl+Shift+Esc); you should see "ShaderCompileWorker" processes active and high CPU usage. First-Time Load
: This extreme delay typically only happens during the very first launch after installation or after a major update. Unreal Engine Expected Wait Times
Wait times vary wildly based on your hardware specifications: High-End PCs (e.g., 512GB+ SSD, modern CPU) : May load in 5–10 minutes Mid-Range PCs : Can take between 50 minutes and 5 hours Lower-End Systems Do not try these out of order
: Users have reported it taking significantly longer, sometimes appearing to hang for hours. Unreal Engine Recommended Solutions The "Wait it Out" Method
: The most effective solution is simply to let the program run. Do not close the window, as this resets the compilation progress. Check for Crashes
: If the loading screen disappears or an error message pops up, it has actually crashed. If it remains at 45% with a spinning icon or high CPU usage, it is still working. Firewall Permissions
: Ensure your firewall isn't blocking the editor or the shader workers. Some users found success by giving the Unreal Editor full permissions. Hardware Limitations
: If you do not have a dedicated GPU, the editor may fail to launch entirely or perform so poorly that it effectively stays frozen. Unreal Engine
Has the loading screen been at 45% for more than 5 hours, or do you see any specific error messages?
Here’s an informative review of the issue “Hello Neighbor Mod Kit stuck at 45%” — covering what causes it, common fixes, and whether it’s a software or user-side problem.
The Mod Kit is older and sometimes fights with Windows 10/11 security permissions.
If none of the above works, the error log will tell you exactly what’s failing.