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
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 hello neighbor mod kit stuck at 45
Bottom line: 45% is almost always an asset or installation issue. Don’t keep relaunching the kit without trying the fixes above—it won’t resolve itself. Start with removing recent imports, then reinstall if needed. The Hello Neighbor Mod Kit appearing "stuck" at
Clear Save Data: Occasionally, corrupted playtest data can cause hangs. Navigate to the Mod Kit folder, then to HelloNeighbor > Saved > SaveGames and delete the files inside. How long has it been stuck at 45%
Hello Neighbor Mod Kit Stuck at 45%: Causes and Solutions Getting stuck at 45% while loading the Hello Neighbor Mod Kit is one of the most common issues developers face when using the Unreal Engine-based toolkit. This specific percentage is the "gatekeeper" moment where the editor transitions from loading core files to compiling complex assets. Why Does It Freeze at Exactly 45%?
The Hello Neighbor Mod Kit (based on UE 4.19) is resource-intensive.
Do not try these out of order. Start with Step 1, and stop when the problem is solved.