You launch your game, and instead of the main menu, you get a cold error message: “Failed to Create HUD Main Menu.” Nothing loads. The screen just sits there. It’s one of those problems that feels catastrophic but is almost always fixable once you know what’s causing it.
This article covers what the error actually means, why it shows up across different games and engines, and how to fix it step by step — with specific guidance for Fallout: New Vegas and TTW, Unreal Engine projects, RimWorld, and Source engine games like TF2.
What This Error Actually Means
When you see “Failed to Create HUD Main Menu,” the game tried to load the files that define how your HUD and main menu look and behave — and something went wrong during that process.
To be clear about terms: your HUD is the in-game overlay that shows things like your health bar, ammo counter, and compass. The main menu is the first screen you see when the game launches. Both are driven by definition files — usually XML files, widget blueprints, or scripts — that the engine must load successfully before anything appears on screen.
The error does not mean the game itself is broken beyond repair. It means one or more of those definition files is missing, corrupted, or conflicting with another file. In most cases, this happens in modded setups where multiple mods are trying to control the same menu files at the same time.
The Most Common Causes Behind This Error
Before you start applying fixes, it helps to know which category your problem likely falls into. Here are the most common causes:
- Leftover HUD files from old mods. If you removed a HUD mod but didn’t clean out its files from the menus folder, those orphaned files can conflict with your new setup.
- Wrong load order. A patch loading before the mod it’s meant to patch, or HUD mods loading before the UI frameworks they depend on, will break things reliably.
- Two mods overwriting the same file. If two mods both modify start_menu.xml, you can end up with broken or duplicated XML entries that the engine can’t parse.
- Missing dependencies. Script extenders like NVSE, or UI frameworks like UIO or MCM, need to be installed and up to date. If they’re missing or outdated, mods that rely on them will fail to load.
- Archive invalidation not enabled. Without this, the game ignores modded files entirely and loads vanilla versions instead — which can cause errors when the mod expects its files to be active.
- Wrong GameMode in Unreal Engine. A gameplay HUD widget can spawn during the main menu level if the wrong GameMode is assigned to that map.
- Uppercase filenames in Source engine games. A 2025 TF2 update changed how the Source engine reads files. Custom HUD font files with uppercase letters in their names stopped loading correctly.
How to Fix It in Fallout: New Vegas and TTW
This is where the error shows up most often, usually in setups involving VUI+, DarnUI, Clean Vanilla HUD, MCM, Project Nevada, or any combination of these. Here’s how to work through it systematically.
Step 1: Clean Out Leftover HUD Files
Before installing any HUD mods, check your Data\menus folder for files left behind by previous mods. Don’t delete files randomly — target only non-vanilla HUD and UI XMLs. If you’re unsure what’s vanilla, compare against a clean game installation or use a mod manager that tracks file ownership.
Step 2: Fix Your Load Order
Load order matters more than most players realize with UI mods. The correct sequence for common FNV HUD mods is:
- VUI+ loads first among HUD mods
- Clean Vanilla HUD loads after VUI+
- The Clean Vanilla HUD patch loads after the main Clean Vanilla HUD mod
Patches must always load after the mod they’re patching. Getting this backwards is one of the fastest ways to produce this error.
Step 3: Fix the start_menu.xml File (DarnUI + MCM + Project Nevada Setups)
This is a very specific but extremely common conflict. When DarnUI, MCM, and Project Nevada are all installed, multiple mods can write to menus\options\start_menu.xml. The result is duplicate include lines that break the XML.
Open menus\options\start_menu.xml and check that there is exactly one line that reads <include src="includes_StartMenu.xml"/>. If you see it more than once, remove the duplicates. Then open menus\prefabs\includes_StartMenu.xml and make sure the MCM include block is present — it should reference MCM\MCM.xml once and only once. When reinstalling, apply DarnUI’s start_menu.xml last so it takes priority cleanly.
Step 4: Install Mods in the Right Order
Install UIO (UI Organizer) first, then install your HUD mods afterward. UIO is designed to merge HUD mod files correctly, but it can only do that if it’s in place before the other mods are dropped in. Reinstalling HUD mods after UIO — not before — is a step many guides skip over.
Step 5: Enable Archive Invalidation
If archive invalidation isn’t active, the game won’t load your modded UI files at all. It will try to run with vanilla files, which creates errors when those files don’t match what your mods expect. Enable it through your mod manager or manually through the game’s INI settings.
Step 6: Verify Your Script Extenders and Frameworks
Make sure NVSE, JIP LN NVSE, and UIO are all installed correctly and running the versions compatible with your other mods. An outdated JIP plugin or a missing NVSE install is often the root cause when everything else looks right.
Step 7: Isolate the Problem Mod
If the error appeared after adding one specific mod, disable your HUD and UI mods one at a time and relaunch after each change. This takes patience, but it’s the most reliable way to identify which mod is the actual culprit. You can also run FNVEdit and look for flagged errors or missing FormIDs in your plugin list.
How to Fix It in Unreal Engine Projects
In Unreal Engine, this error typically comes from a HUD widget spawning during the main menu level when it shouldn’t be there at all.
The fix is straightforward: your main menu level should use a separate GameMode — ideally GameModeBase — with no gameplay pawn assigned. This prevents the gameplay HUD from spawning on the menu screen. Don’t set the Default Pawn to your gameplay character in the main menu map.
If you’re creating your HUD widget inside your character’s BeginPlay event, that’s what’s causing the overlap. Move HUD widget creation to the level blueprint of your actual gameplay map instead. That way, the HUD only appears when you’re playing, not when you’re sitting on the main menu.
How to Fix It in RimWorld
In RimWorld, mod errors can prevent the HUD and ESC menu from drawing at all, leaving you stuck with a loaded world but nothing to interact with.
The fastest approach is to check your log files. If you have Hugslib installed, it produces readable logs that show exactly which mod is throwing errors. Identify the problem mod, disable it, and relaunch. The HUD should reappear once the broken mod is out of the picture.
How to Fix It in TF2 and Source Engine Games
After a 2025 Source engine update, some custom TF2 HUDs stopped loading fonts correctly. The cause was uppercase letters in HUD font filenames conflicting with how the updated engine reads files.
The fix is simple: rename your HUD font files to use all lowercase letters. Once the filenames match what the engine expects, the fonts load correctly and the HUD works again.
General Prevention Tips
Most of these errors are avoidable with a bit of upfront discipline. A few habits that save a lot of troubleshooting time:
- Always start from a clean install before doing heavy UI or HUD modding. Remove old menus directories and leftover configs before adding anything new.
- Keep backup copies of key XML files like start_menu.xml before installing new UI mods. If something breaks, you can restore quickly.
- Read the installation instructions for every HUD or UI mod you add. Load order and dependency requirements are usually spelled out — following them prevents most conflicts.
- Use your mod manager’s file conflict view to see which mod last overwrote a menu file. This tells you immediately where to look when something breaks.
If you’re researching solutions for other gaming-related issues, Bizblinks is worth bookmarking as a general resource hub.
When to Look Beyond Mods
If your game is crashing or behaving erratically even without any HUD mods installed, the problem may not be UI-related at all. Check OS compatibility settings, update your graphics drivers, and try launching
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