How To Fix Diablo 4 Was Unable To Open a Critical File Error

With the release of Diablo 4 on Xbox Game Pass, the number of players has increased, and with it, new problems as well. In particular, players who try to play the game on Game Pass encounter the error “Diablo 4 was unable to open a critical file!” and cannot play the game. This may be due to the Xbox Game Pass service not yet being able to communicate properly with Blizzard’s launcher. But don’t worry, you can easily get rid of this error by trying the solutions below.

Best Ways To Fix Diablo 4 Was Unable to Open a Critical File Error

This error is usually encountered by players trying to play Diablo 4 on Xbox Game Pass, and it’s most likely due to Game Pass and Battle.net not connecting properly, as we mentioned earlier. “Diablo 4 was unable to open a critical file” error can be fixed in a few steps. Try the following solutions in order.

Solution 1: Check For Updates

If a new update rolled out to the game without you noticing, there’s a good chance that’s why you’re getting this error. Especially if you prefer to update your games manually.

1. Close the Xbox app and Battle.net completely.
2. Then just open Battle.net and check Diablo 4 for updates.
3. Then do the same for the Xbox app.

Solution 2: Verify The Game Files

Although it may seem like a classic method, the best way to troubleshoot this type of error is always to check the integrity of the game files. Since this error is also related to a critical file, it will most likely fix the “Diablo 4 was unable to open a critical file” error.

1. Launch Battle.net.
2. Click on Diablo 4 and click on the Settings icon to the right of the blue Play button.
3. Then select the “Scan and Repair” option.

Solution 3: Ultimate Fix

If the second solution didn’t help you fix your error, this method will definitely work.

1. Open Task Manager.
2. Close the Xbox App and Battle.net completely.
3. Press “Windows + R” and type “C:\ProgramData\” in the box that appears and press OK.
4. In the folder that opens, find the folder named Battle.net and delete it from your computer.
5. Now reopen Battle.net and reinstall Diablo 4. When installing, you need to select the place where you installed the game.

In step 5, it is very important to select the correct folder where Diablo 4 is located to avoid completely re-downloading the game. Well, friends, one of the above solutions will surely help you solve this error. Have fun playing!