: 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
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
In Unreal Engine 4 architecture,
Windows has a default maximum path limit of 260 characters. Because the Hello Neighbor Mod Kit utilizes deeply nested folder structures for its blueprints, animations, and audio files, installing the mod kit deep within your user folders can cause it to freeze when it tries to load a file path that is too long.
Leave the computer entirely alone. Do not click on the window (which might trigger a "Not Responding" crash) and let the shaders finish compiling. Subsequent launches will take only seconds. 2. Clear the Derived Data Cache (DDC) hello neighbor mod kit stuck at 45
Sometimes, the mod kit cannot write the necessary shader files because it lacks permissions. Find the HelloNeighborModKit.exe file. Right-click it and select . Final Troubleshooting Steps
: Press Ctrl + Shift + Esc to open the Task Manager. Look for processes named ShaderCompileWorker.exe . If these are active and using CPU power, the Mod Kit is still working and you should let it continue. : Ironically, running as an Administrator can sometimes
: Systems without a dedicated GPU or with less than 8GB of RAM may struggle to complete this process at all.
: Occasionally, corrupted playtest data can cause hangs. Navigate to the Mod Kit folder, then to HelloNeighbor > Saved > SaveGames and delete the files inside. Because the Hello Neighbor Mod Kit utilizes deeply
Wait for the verification to complete and try launching the mod kit again. 3. Clear Shader Cache (DerivedDataCache)