“Failed to Load Mods” Error & Fixes

Table of Contents

Introduction

A failed to load mods error is one of the most disruptive issues a modded game setup can produce. The game launches, BepInEx initializes, and then some or all mods fail to appear in game despite being listed as installed and enabled in your mod manager.

The error manifests differently depending on the game and mod manager involved but the underlying causes follow consistent and well documented patterns.

Understanding what actually triggers a mod loading failure and working through fixes in a structured sequence resolves the vast majority of cases without requiring a complete setup rebuild.

Quick Answer about Failed to Load Mods

The most common cause of a failed to load mods error is a BepInEx installation that is missing, outdated, or incorrectly configured for the current game version
Mod version mismatches between an installed mod and the current game client version produce loading failures even when the mod appears correctly installed
A missing or broken dependency causes every mod that depends on it to fail loading simultaneously, often appearing as a mass mod failure rather than a single mod issue
Incorrect launch method bypassing the mod manager is one of the most frequently overlooked causes of mods not appearing in game
R2modmanager and similar managers store mods in a separate profile directory that only activates when the game is launched through the manager rather than directly through Steam
BepInEx log files are the most reliable diagnostic tool for identifying exactly which mod failed to load and why
Mods built for an older game API version will fail silently after a game patch without producing a visible in game error message
Conflicting mods that modify the same game system can cause both to fail loading rather than one overriding the other
A clean reinstall of BepInEx through r2modmanager resolves the majority of persistent mod loading failures that other fixes do not address

What Does a Failed to Load Mods Error Actually Mean?

The phrase failed to load mods covers a range of distinct failure states that each have different causes and different fixes. Grouping all mod loading failures under a single description leads to applying the wrong fix and prolonged troubleshooting that does not address the actual problem.

Identifying the specific failure state from the symptoms observed is the most important first step before attempting any fix.

Types of Mod Loading Failures and Their Symptoms

Complete mod loading failure occurs when no mods from the active profile appear in game at all. The game launches and runs normally but behaves as though no mods are installed.

This symptom almost always indicates either an incorrect launch method bypassing the mod manager or a BepInEx installation failure that prevents the entire mod loading framework from initializing.

Partial mod loading failure occurs when some mods load correctly while others do not. This symptom indicates a problem specific to the failing mods rather than a global framework issue. Missing dependencies, version mismatches, and individual mod corruption are the most common causes of partial failures.

Silent loading failure occurs when mods appear to be active based on the mod manager’s installed list but produce no visible effect in game. This is the most difficult failure type to diagnose because the game does not display any error and the mod manager shows no problem. Outdated mods whose API hooks no longer connect to the current game version most commonly produce this symptom.

Crash on load failure occurs when the presence of a specific mod causes the game to crash during the loading sequence before the main menu or gameplay is reached.

The game does not reach a playable state, making in game observation impossible. BepInEx log files are the only reliable diagnostic tool for this failure type.

How BepInEx Relates to Mod Loading Failures

BepInEx is the foundational modding framework that most Risk of Rain 2 and many other game mods are built upon. It intercepts the game’s loading process and injects mod code into the game runtime before gameplay begins.

When BepInEx itself fails to initialize correctly, every mod that depends on it fails simultaneously. This produces a complete loading failure that appears identical to a scenario where no mods are installed at all.

Signs that BepInEx specifically is the source of the loading failure:

No mods load at all despite all being listed as installed and enabled in r2modmanager
The BepInEx console window does not appear when launching the game through r2modmanager
The BepInEx log file is either absent or contains only initialization errors without any mod loading entries
Launching the game directly through Steam without r2modman produces identical behavior to launching through r2modman
No BepInEx folder exists in the expected location within the r2modman profile data directory for the active profile

How to Diagnose a Failed to Load Mods Error

Systematic diagnosis using available log data is significantly more efficient than trial and error troubleshooting. R2modman and BepInEx both generate log files that record exactly what happened during the last mod loading attempt, identifying the specific failure point without guesswork.

Reading the BepInEx Log File

The BepInEx log file is the primary diagnostic resource for any mod loading failure. It records every step of the mod loading process including which mods were detected, which loaded successfully, which failed, and the specific error that caused each failure.

The log file is located within the BepInEx folder inside the r2modman profile data directory for the active profile.

How to locate and read the BepInEx log file:

Open r2modman and navigate to the active profile showing the mod loading failure
Look for a Browse profile folder or Open data folder option within the profile settings or tools menu
Navigate into the BepInEx subfolder within the profile folder
Open the file named LogOutput.log using any plain text editor
Scroll to the bottom of the log file as the most recent events are recorded last
Look for lines beginning with ERROR or WARNING as these identify failed mod loading attempts
Note the mod name or file path referenced in each error line to identify which specific mods failed
Look for lines reading Loading followed by a mod name to confirm which mods did load successfully before the failure occurred

Key log entries and what they indicate:

Could not load mod, missing dependency: The failing mod requires another mod that is not installed or is installed at an incompatible version
Exception in mod constructor: The mod’s initialization code threw an error, typically from a version mismatch with the current game build
Skipping mod, disabled: The mod is listed as disabled in r2modman and intentionally not loaded, not a failure
Mod loaded successfully: Confirmation that a specific mod completed loading without errors
Fatal error in plugin: A critical failure in a specific mod that may have prevented subsequent mods from loading

Identifying Missing Dependencies From the Log

Missing dependency errors are among the most informative log entries because they directly name both the mod that failed and the specific dependency it requires. This information makes the fix immediately clear without requiring further investigation.

How to identify and resolve missing dependency errors:

Search the BepInEx log for lines containing dependency or missing
Note the exact name and version of the missing dependency referenced in the error
Open r2modman and search for the missing dependency in the Online tab
Install the missing dependency and relaunch the game to test whether the loading failure resolves
If the dependency is listed as installed but still referenced as missing in the log, uninstall and reinstall it to restore a clean copy
Check whether the installed dependency version matches the version required by the failing mod, as version specific dependency requirements are a frequent cause of persistent missing dependency errors

Common Problems and Solutions:

Problem: BepInEx log file does not exist in the expected profile folder location Solution: BepInEx has not initialized at all; confirm BepInEx is listed as installed in the r2modman Installed tab and reinstall it through r2modman if missing or if the log file is absent
Problem: Log file exists but contains no entries beyond the initial BepInEx startup lines Solution: BepInEx initialized but found no mods to load, confirming the active profile either contains no mods or the game is not being launched through r2modman correctly
Problem: Log shows all mods loading successfully but they still do not appear in game Solution: This is a silent loading failure; the mods are loading but their hooks into the game API are not connecting, most commonly from a game version mismatch; update all mods and check for game patches
Problem: Log references a specific mod causing a fatal error that stops subsequent mods from loading Solution: Disable the mod causing the fatal error in r2modman and relaunch; once the game loads correctly with that mod disabled, check its Thunderstore page for known issues or updates
Problem: Multiple different dependency errors appear for different mods simultaneously Solution: A shared dependency used by multiple mods is missing or broken; identify the common dependency referenced across the errors and reinstall it through r2modman

Step by Step Fixes for Failed to Load Mods Errors

Working through fixes in order from least to most disruptive resolves the majority of mod loading failures efficiently. Each fix addresses a specific category of cause and most players resolve their issue within the first two or three steps.

Fix One: Confirm the Game Is Launched Through R2ModManPlus

The most overlooked cause of a complete mod loading failure is launching the game directly through Steam rather than through r2modman. Mods installed through r2modman are stored in a profile specific directory that only activates when the game is launched through the manager’s Start modded button.

Launching through Steam bypasses this directory entirely and the game runs as though no mods are installed.

How to confirm and correct the launch method:

Close Risk of Rain 2 if it is currently running
Open r2modman and navigate to the active profile containing your installed mods
Confirm the profile shown is the one containing the mods you expect to see in game
Click the Start modded button within r2modman rather than launching through Steam directly
Verify the BepInEx console window appears briefly during game startup, confirming the modded launch path is active
If the BepInEx console does not appear, BepInEx is not initializing and the launch is not going through the modded path correctly

Fix Two: Reinstall BepInEx Through R2ModManPlus

A corrupted or outdated BepInEx installation is the most common cause of complete mod loading failure after confirming the correct launch method is being used. Reinstalling BepInEx through r2modman restores the framework to a clean functional state without affecting other installed mods.

Step by step BepInEx reinstallation process:

Open r2modman and navigate to the affected profile’s Installed tab
Locate BepInEx in the installed mod list
Click Uninstall next to BepInEx and confirm the uninstall action
After uninstalling, navigate to the Online tab and search for BepInEx
Install the latest version of BepInEx appropriate for your game
Return to the Installed tab and confirm BepInEx appears with a current version number
Launch the game through r2modman’s Start modded button and check whether mods now load correctly
Open the BepInEx log file after the launch attempt to confirm the framework initialized successfully

Fix Three: Identify and Resolve Mod Conflicts

When partial mod loading failures occur with some mods loading correctly and others failing, mod conflicts are frequently the cause. Two mods that modify the same game system can prevent each other from loading correctly even when both are individually functional.

How to identify conflicting mods through systematic isolation:

Disable all mods in the active profile except BepInEx through the r2modman Installed tab
Re enable mods one at a time, launching the game after each addition to identify when the loading failure reappears
The last mod enabled before the failure returns is either the conflicting mod or the mod that exposes a conflict with a previously enabled mod
Check the Thunderstore pages for both the newly enabled mod and the previously enabled mods for documented compatibility warnings
Disable one of the conflicting mods permanently or check whether a compatibility patch exists that resolves the conflict

Fix Four: Update All Mods and Verify Game Version Compatibility

After a game patch, mods built against the previous game API version may fail to load silently or produce errors in the BepInEx log referencing missing game functions. Updating all mods is the standard first response to loading failures that appear immediately after a game update.

Step by step mod update and compatibility verification:

Open r2modman and navigate to the affected profile’s Installed tab
Apply all available mod updates using the Update all option or individual update buttons
After updating, check the Thunderstore pages of any mods still failing to load for patch compatibility announcements
If a mod has not yet released a patch compatible with the current game version, disable it temporarily and monitor its Thunderstore page for an update
Relaunch the game after updates are complete and verify the BepInEx log shows successful loading for previously failing mods

Mod Loading Failure Diagnostic Reference Table

Symptom	Most Likely Cause	First Fix	Escalation
No mods load at all	Wrong launch method or BepInEx failure	Use Start modded in r2modman	Reinstall BepInEx
Some mods load, others do not	Missing dependency or mod conflict	Check BepInEx log for errors	Isolate conflicting mods
Mods load but have no effect	Silent API mismatch after game patch	Update all mods	Disable outdated mods
Game crashes during mod loading	Fatal error in specific mod	Check BepInEx log for fatal entry	Disable identified mod
BepInEx log absent	BepInEx not installed or not initializing	Reinstall BepInEx via r2modman	Verify launch method
Missing dependency errors in log	Required mod not installed	Install missing dependency	Check version compatibility
Mods loaded per log but invisible in game	Game version API mismatch	Update mods	Disable incompatible mods
All mods fail after game patch	Outdated mod versions	Update all mods via r2modman	Disable unpatched mods

Frequently Asked Questions

Why do my mods not load even though r2modman shows them as installed and enabled?

The most common cause is launching the game directly through Steam rather than through r2modman’s Start modded button. Mods installed through r2modman only activate when the game is launched through the manager. Confirm you are using Start modded and check the BepInEx log for any initialization errors.

How do I know which specific mod is causing the loading failure?

Open the BepInEx log file located in the BepInEx folder within your r2modman profile data directory. Search for lines beginning with ERROR or containing the word failed. These lines identify the specific mod that encountered a loading error and describe the cause.

Can a single broken mod prevent all other mods from loading?

Yes. A mod that causes a fatal error during BepInEx’s initialization sequence can halt the entire mod loading process, preventing all subsequently loaded mods from initializing. The BepInEx log will show the fatal error entry followed by an absence of loading entries for all mods that should have loaded after it.

What is the difference between a mod failing to load and a mod being disabled?

A disabled mod is intentionally prevented from loading through the r2modman interface and appears in the BepInEx log as skipped rather than failed. A mod that fails to load attempts initialization but encounters an error that prevents it from completing. The BepInEx log distinguishes these states clearly with different log entry types.

Why do mods fail to load after a game update even though I did not change anything?

Game updates can modify the API functions that mods hook into, removing or renaming the functions that mods depend on. When a mod attempts to connect to a function that no longer exists in the updated game, it fails to load silently or produces an exception error in the BepInEx log. Updating mods after every game patch is the standard prevention measure.

How do I fix a missing dependency error without knowing which mod to install?

The BepInEx log names the specific missing dependency in the error message. Search for the exact dependency name in r2modman’s Online tab and install it. If the dependency does not appear in search results, check the failing mod’s Thunderstore page as it will list all required dependencies with links to their listings.

Is it safe to disable mods one at a time to find a conflict?

Yes. Disabling mods through r2modman’s Installed tab does not uninstall them or delete any files. Disabled mods can be re enabled at any time. This makes systematic conflict isolation a safe and reversible troubleshooting process.

What should I do if no mod updates are available but mods are still failing after a game patch?

Check the Thunderstore pages and GitHub repositories of the failing mods for announcements about patch compatibility. Mod authors frequently post update timelines in their mod descriptions or community sections after game patches. Disable the incompatible mods temporarily and monitor for updates rather than attempting workarounds that are unlikely to resolve an API incompatibility.

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