Fix Baldur’s Gate 3 Launcher Data Mismatch

BG3 Launcher Data Mismatch – Baldur’s Gate 3 isn’t a perfect game; some bugs and errors make the experience slightly frustrating. Moreover, one such bug that has recently come to light is the “Launcher Data Mismatch” error caused by (logically) mods, corrupted files or something that isn’t singled out now.

If you’re facing the same issue, don’t worry; we have your backs with a whole bunch of fixes that you could perform to fix this particular bug. Keep reading as we get to the bottom of it!

Fix Baldur’s Gate 3 Launcher Data Mismatch

Here’s a point-wise distribution of potential fixes to this bug in Baldur’s Gate 3.


Fix Baldur's Gate 3 Launchere Data Mismatch using Mods

If you have any mods installed, you might need to remove them to continue playing normally. To do the same, look at the Mods and Public folder and delete anything you find in it. This particular folder can be located in \steamapps\common\Baldurs Gate 3\Data. Alternatively, you can also visit %LocalAppData%\Larian Studios/Baldurs Gate 3\Mods.

Location: C:\Users\<UserName>\AppData\Local\Larian Studios\Baldur’s Gate 3.

Alternate Location: %LocalAppData%\Larian Studios\Baldur’s Gate 3\PlayerProfiles

All you need to do with the above file locations is paste them in your file search bar, locate the mods folder, and delete the same. If this still doesn’t fix the bug, follow the next fix! 

Try the “Verify integrity of game files” method on Steam

Verify Steam Files Fix Baldur's Gate 3 Launcher Data Mismatch

Verifying the integrity of game files is a really good way to remove/reinstall any corrupt game files and make sure that the game functions smoothly; this function also works well recovering any files that are missing; either way, here’s how you could perform a steam file verification-

  • Start Steam and head to your game library.
  • Once you’re here, look for Baldur’s Gate 3, and once you’ve found it, right-click on the same.
  • Select properties From the drop-down menu and head into the local files tab on the top.
  • Look for the “verify integrity of the game files” option and click on it.
  • Once the automated verification process is done, restart the game and check if the bug has been fixed.

If the bug still hasn’t been fixed, don’t worry. We might still have something for you!

Delete Early Access Data

If you’ve played the earlier version of Baldur’s Gate 3 (the early access version), you need to delete those old files if they still exist on your device because those files are now incompatible with the current version of the game. To do this, you only need to open Baldur’s Gate 3 and click “Load Game” from the main menu. Find your old campaign, delete it and restart the game if it does exist. Check if the bug has now been fixed! 

Delete useless files

Whenever a data mismatch error occurs, the launcher automatically creates a file that includes all non-required files. Locate the folder by following the pathway below and delete all those extra files. 

  • Paste the following into your file explorers bar and press enter: %LocalAppData%\Larian Studios\Launcher\Cache
  • Here, locate a file named Galaxy or Steam, and the same file includes the game’s version number. The file can easily be spotted using the “_alteredFiles.txt” extension. Deleting extra languages that you do not use:

For some players, deleting the German.pak (German language file) has caused the error to fix itself, and this could be something you can try out if all the aforementioned fixes haven’t helped you yet! Here’s the location of the file: 

SteamLibrary\steamapps\common\Baldurs Gate 3\Data\Localization\German

That’s all we’ve got on how you could fix the Launcher Data Mismatch bug in Baldur’s Gate 3. Suppose the aforementioned fixes haven’t helped you. In that case, you may contact Larian Studios’ Support directly to get your file issue resolved, and as a last resort, you might as well reinstall the game if you’ve got all of your data and progress secured on the Steam cloud (make sure it is before you delete the game)!

If you think this guide has helped you, then let us know in the comment section below. Also, if you are facing problems not mentioned in this article, you can check out our other guides on Baldur’s Gate III. We will try to come out with a fix. Good luck.

That’s all, folks! 

Last Updated on August 18, 2023

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