How To Fix Baldur’s Gate 3 Data Mismatch Error? [SOLVED]

Baldur’s Gate 3 is an action role-playing video game developed and published by Larian Studios. Since its release, Baldur’s has enjoyed great success, with fans praising the game for its magnificent aesthetics and development. However, users have encountered a frustrating error called “Baldur’s Gate 3 Data Mismatch Error”. Many users have complained about the error, which leaves them confused and wanting solutions. 

BG3 Data Mismatch Error states “We’ve detected a data mismatch, which may be caused by unsupported mods, corrupt files, or unknown data. This could cause crashes or issues running the game.”

What Causes The Baldur’s Gate 3 Data Mismatch Error?

The Baldur Gate 3 error is very frustrating. It can be caused by several reasons, including:

• Corrupted or missing game files.
• Mods and custom content created by players.
• Incompatibility with Early Access Saves.
• Software Conflicts.
• Incorrect game settings or configuration files.
• Cached data, Server-Side Issues, or coding bugs.

This standard error can easily be fixed using our error fixes in this guide.

Delete Installed Mods

Installed and outdated mods most commonly cause the data mismatch issue in Baldur’s Gate 3. If you have saved games like Baldur’s Gate 3 on your computer and have used mods in the past, this may result in issues when you launch the game. To stop this from occurring, removing any installed mods is advised:

• Navigate to the location bar.
• Type %LocalAppData%/LarianStudios/Launcher/Cache in Windows File Explorer.
• Check If this folder already exists.
• Delete it by pressing the delete button if the folder exists. 
• If this folder does not exist, enter the following…/Baldurs Gate 3/Data.
• Go to the profile folder.
• Delete the mod settings.lsx file.
• Empty your recycle bin.
• Check if you’ve entirely deleted unsupported mods.
• Restart Baldur’s Gate 3.
• Check to see if the error has been resolved.

If nothing else works after trying all these steps, contact the official support team for further assistance.

Rename The Larian Studios Folder

Many players who have contacted BG3’s support with the data mismatch problem have been told to rename Larian Studios in response to the error. This can cause you to fix the frustrating error quickly and improve your gameplay. You can do so by following our step-by-step guide given below:

• Navigate to the location bar Win + R.
• Type %LocalAppData%/Larian Studios in the location bar.
• Find Baldur’s Gate 3 named folder.
• Rename the folder other than Baldur’s Gate 3.
• Save the changes made.
• Relaunch the game.
• Check to see if the error persists.

Uninstall And Reinstall Baldur’s Gate 3

Users have reportedly resolved the data mismatch problem by thoroughly cleaning Baldur’s Gate 3. You can eliminate unsupported mods, passing situations, and glitches by doing this.

If all other solutions have failed, we only suggest this choice as a last resort. This error fix may help you resolve the error and allow your game to run smoothly. Follow the steps provided below to do so:

• Open the Steam Client online.
• Navigate to Steam Library.
• Check to see what games you have installed on your computer.
• Find your game folder of Baldur Gate 3.
• Right-click the Baldur’s Gate 3 folder.
• Go to the context menu.
• Select Manage.
• Choose Uninstall.
• Allow the process to complete.
• Re-download and install Baldur’s Gate 3.
• Launch the game folder.
• Check to see if the data mismatched error persists.

Delete Baldur’s Gate 3 Cache Files

You can try removing the cache files to improve “Baldur’s Gate 3’s” performance. These files function as little data bits that make the game run more smoothly. You can restart the game by removing these files because they occasionally lag and cause issues:

• Navigate to the location bar.
• Type %LocalAppData%/Larian Studios/Baldur’s Gate 3/LevelCache.
• Select all the contents in this folder using CTRL + A.
• Press delete on the keyboard.
• Empty your recycle bin. 
• Try launching Baldur’s Gate 3 game.
• Check to see if the data mismatch error persists.

Find Unexpected Files

Every time there is a mismatch data error warning in Baldur’s Gate 3, the launcher generates a file that lists all unnecessary files from the install and modifications folders. These can help fix the error and ensure the game functions properly:

• Navigate to the location bar using Win + R.
• Type %LocalAppData%/Larian Studios/Launcher/Cache into the location bar and press enter.
• Look for a text file that contains the version number of the game.
• Look for either Steam or Galaxy.
• These files should end with _alteredFiles.txt.
• You have Identified the files successfully. 

Verify Steam Game Files

Verifying your game files on Steam might be a helpful step in troubleshooting when dealing with the annoying “Baldur’s Gate 3 Data Mismatch Error.” This procedure verifies that the game’s files are all in their proper locations and are correctly found. Verifying Steam game files recognizes and replaces the files with their original sites. You can do so by following the steps provided below:

• Launch the Steam application on your computer.
• Click on the “Library” tab.
• Navigate to the top to see your list of games.
• Find ‘Baldur’s Gate 3’ in the list.
• Right-click on it and choose “Properties.” 
• Go to the “Local Files” tab.
• Click on the “Verify Integrity of Game Files” button.
• Let Steam check your game’s files against the correct ones on their servers.
• Close and restart the Steam client.
• Launch’ Baldur’s Gate 3′ to see if the Data Mismatch Error still occurs. 

Delete Early Access Saves

The error might be due to saved game files from the early access version of the game not entirely compatible with the latest updates. You should follow the steps given below to help resolve the error in time:

• Navigate to the Saved Games or Save folder in your documents.
• Identify the Early Access Saves.
• Back-Up Important Saves.
• Delete the early access saved game files from the folder.
• Restart ‘Baldur’s Gate 3‘.
• Check to see if the Data Mismatch Error still shows.
• You can also load the game by clicking the “Load game” option.
• Select “Delete campaign.”
• Check again to see if the error persists.

Disable Windows Defender Firewall

Users want smooth gameplay and experience while playing “Baldur’s Gate 3.” However, occasionally Windows Defender Firewall might get in the way of your gaming. To get past issues like the “Data Mismatch Error” in this situation, the Windows Defender Firewall may need to be temporarily disabled. Follow the steps below to turn off the Windows Defender firewall:

• Click the Windows icon on your desktop to access the start menu.
• Click the gear icon to open Windows settings.
• Navigate to the Update & Security option.
• Now go to Windows Security.
• Find the Firewall and network Protection settings.
• Click on it to open a new tab.
• Locate the 3 Firewall options.
• Disable all 3 Firewall options.
• Relaunch the game to see if the error persists. 

If the error isn’t persisting after disabling the Windows Firewall, you can activate it back up and just allow BG3 through your Windows Firewall instead.

Contact Official Support Team

Suppose nothing else seems to work; contact the official Larian support team for further assistance. There are several ways to contact them by navigating to their official website or their online forums.

You can also check the connectivity of their servers and submit your concerns tickets online. Their experts will always be there to help you around the clock. 

Final Words

While Larian Studios is one of the most reliable and consistent gaming developers for its users, its products also have its fair share of issues. Despite this, we hope you can resolve Baldur’s Gate 3 Data Mismatch Error and continue playing your game. We have thoroughly researched and displayed some of the most effective methods to resolve this error. We are confident that our error fixes will help resolve your issues in no time. 

Check out other error-fix articles on Baldur’s Gate 3:

• Baldur’s Gate 3 Error Code 119120612
• Baldur’s Gate 3 Crashing